Predictors of Treatment Response in Depressed Mothers Receiving In-Home Cognitive-Behavioral Therapy and Concurrent Home Visiting

Article · June 2012with86 Reads
DOI: 10.1177/0145445512447120 · Source: PubMed
Abstract
Home visiting is a child abuse prevention strategy that seeks to optimize child development by providing mothers with support, training, and parenting information. Research has consistently found high rates of depression in mothers participating in home visiting programs and low levels of obtaining mental health treatment in the community. Successful treatment of depressed mothers in home visiting programs holds the potential to improve maternal and child outcomes. In-Home Cognitive-Behavioral Therapy (IH-CBT) is an adapted treatment for depressed mothers, which is provided alongside home visiting and seeks to optimize engagement and impact through delivery in the home setting; a focus on issues important to young, low-income mothers; and a strong collaborative relationship between therapists and home visitors. This study examined predictors of depression status at posttreatment in 60 mothers who received IH-CBT and concurrent home visiting. Variables considered included demographics, illness history, severity, and numbers of treatment sessions and home visits. Results indicated that young maternal age, fewer episodes of major depressive disorder, lower depression severity at pretreatment, lower levels of symptoms of personality disorders, and more treatment sessions and home visits predicted asymptomatic status at posttreatment.
Behavior Modification
36(4) 462 –481
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DOI: 10.1177/0145445512447120
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20Ammerman et al.Behavior Modification
1Cincinnati Children’s Hospital Medical Center and University of Cincinnati College of
Medicine, OH, USA
Corresponding Author:
Robert T. Ammerman, PhD, Cincinnati Children’s Hospital Medical Center,
3333 Burnet Avenue, Cincinnati, OH 45229, USA
Email: robert.ammerman@cchmc.org
Predictors of Treatment
Response in Depressed
Mothers Receiving In-
Home Cognitive-Behavioral
Therapy and Concurrent
Home Visiting
Robert T.
Ammerman1, James L. Peugh1, Frank
W. Putnam1, and Judith B.
Van Ginkel1
Abstract
Home visiting is a child abuse prevention strategy that seeks to optimize
child development by providing mothers with support, training, and parent-
ing information. Research has consistently found high rates of depression in
mothers participating in home visiting programs and low levels of obtaining
mental health treatment in the community. Successful treatment of depressed
mothers in home visiting programs holds the potential to improve maternal
and child outcomes. In-Home Cognitive-Behavioral Therapy (IH-CBT) is an
adapted treatment for depressed mothers, which is provided alongside home
visiting and seeks to optimize engagement and impact through delivery in the
home setting; a focus on issues important to young, low-income mothers;
and a strong collaborative relationship between therapists and home visi-
tors. This study examined predictors of depression status at posttreatment
in 60 mothers who received IH-CBT and concurrent home visiting. Variables
considered included demographics, illness history, severity, and numbers of
treatment sessions and home visits. Results indicated that young maternal
Original Articles
Ammerman et al. 463
age, fewer episodes of major depressive disorder, lower depression sever-
ity at pretreatment, lower levels of symptoms of personality disorders, and
more treatment sessions and home visits predicted asymptomatic status at
posttreatment.
Keywords
home visiting, maternal depression, cognitive-behavioral therapy, adapted
treatment
Home visiting is a child abuse prevention strategy that targets new mothers
and their children who are at demographic risk for adverse parenting out-
comes. Such programs typically seek to enroll mothers prenatally or during
the first months after the child’s birth, provide a trained visitor who provides
services in the home setting, deliver a developmentally aligned curriculum
that focuses on positive child development and meeting maternal and child
needs, and link families to other resources in the community (Boller &
Strong, 2010). The overarching objective of home visiting is to optimize
child development and maternal life course by providing intensive services
and support during the critical early years of the child’s life.
By seeing mothers in the home, a frequent barrier to services is overcome.
As a result, home visiting programs are an ideal setting in which to identify
and intervene with depressed mothers who might otherwise fail to receive
adequate care (National Research Council and Institute of Medicine, 2009).
Depression is commonly reported in mothers enrolled in home visiting pro-
grams. Indeed, most mothers in home visiting programs display characteris-
tics associated with elevated risk for depression, including being unmarried,
socially isolated, young, living in poverty, and victims of violence (Segre,
O’Hara, Arndt, & Stuart, 2007). For example, Ammerman et al. (2009) found
that 45.3% of mothers participating in a regional home visiting program had
elevated levels of depressive symptoms using the Beck Depression Inventory–
II (BDI-II) at two time points in the 1st year of service. This study also reported
that 74.1% of mothers experienced childhood trauma and violence prior to
enrollment. Depression in mothers in home visiting is associated with greater
impairments in parenting, increased parenting stress, and social isolation rela-
tive to nondepressed mothers (Ammerman, Shenk, et al., 2011). Research has
consistently demonstrated that (a) depressed mothers in home visiting rarely
obtain mental health treatment in the community and (b) home visiting by
itself yields little benefit to maternal depressive symptoms over the course of
464 Behavior Modification 36(4)
services (Ammerman, Putnam, Bosse, Teeters, & Van Ginkel, 2010). Because
maternal depression can mitigate the benefits of home visiting and prolonged
exposure to depressed mothers can contribute to poor outcomes in children
(Hay, Pawlby, Waters, Perra, & Sharp, 2010), it is important to provide effec-
tive treatment to this population.
In response to this need, Ammerman, Bodley, et al. (2007) systematically
adapted cognitive-behavioral therapy (CBT) for use with depressed mothers
receiving home visitation. Implemented by trained therapists and delivered
concurrently with home visiting, In-Home Cognitive-Behavioral Therapy
(IH-CBT) combines the principles and strategies of CBT (J. S. Beck, 2011)
with a set of procedures and approaches that promotes engagement, makes
content relevant to the needs of young mothers, permits implementation in the
home setting, and forges a strong collaborative relationship between the thera-
pist and home visitor to smoothly coordinate services and optimize outcomes.
Adaptations include identifying suitable areas for conducting therapy in
homes that are often small, crowded, and unkempt; addressing the unique
issues of socially isolated, low-income mothers who are raising a new baby;
and creating close working relationships between home visitors and thera-
pists. IH-CBT is a focused treatment that emphasizes the reduction of mater-
nal depressive symptoms and recovery from major depressive disorder
(MDD), thereby allowing home visitors to attend to issues related to parent-
ing, maternal functioning, and child development. IH-CBT is delivered in 15
weekly sessions and a 1-month booster that are in addition to visits provided
by home visitors. There is regular contact between the therapist and home visi-
tor over the course of treatment, and home visitors attend the 15th session to
review treatment impacts and facilitate home visitor support of mothers fol-
lowing termination (Ammerman, Putnam, Stevens, et al., 2011).
Preliminary evidence suggests that IH-CBT is efficacious in the treatment
of depressed mothers in home visiting. Ammerman, Putnam, Stevens, et al.
(2011) provided IH-CBT to 64 mothers aged 18 years and older who were
participating in a home visiting program, obtained scores of ≥20 on the
BDI-II, and met criteria for MDD using the Primary Care Evaluation of
Mental Disorders (PRIME-MD; Spitzer et al., 1994). Pre–post comparisons
revealed that 46.9% of mothers were partially remitted in terms of MDD
diagnosis and 32.8% were fully remitted at the end of treatment. Mothers also
reported decreased depressive symptoms, and improvements in social sup-
port, relationships, coping, and satisfaction with motherhood. A subsequent
comparison of the 64 mothers to 241 mothers who had similarly elevated
BDI-II scores at enrollment in home visiting showed a large reduction (M
difference = 7.8 points, p < .01) in the treatment group relative to untreated
Ammerman et al. 465
mothers. Group comparisons were not moderated by maternal age, race, edu-
cation, or home visitation model, suggesting that the adaptations made in
IH-CBT were successful in impacting the diverse populations served by
home visiting. Yet, it is not known what characteristics or other variables are
most predictive of improvement of maternal depression in those receiving
IH-CBT.
Identifying predictors of outcome among individuals who receive treatment
is a useful way to determine who is most likely to benefit from a specific inter-
vention. Such prognostic information can be used to refine treatments to better
address the needs of those who respond less optimally (Driessen & Hollon,
2010), and to determine at the start of treatment to what extent individuals
might benefit based on pretreatment characteristics. Several reviews have sum-
marized research examining predictors of outcomes in CBT for adult depres-
sion (Driessen & Hollon, 2010; Haby, Donnelly, Corry, & Vos, 2006; Hamilton
& Dobson, 2002). These efforts have identified demographic, clinical, and
treatment process variables that are associated with favorable or poor out-
comes. In terms of demographics, unmarried status and older age have been
found to predict poorer response to CBT in depressed adults (e.g., Fournier
et al., 2009). There is also a consistent and robust relationship between illness
severity and outcomes. Chronic depression, pretreatment depression severity,
earlier onset of MDD, and comorbid personality disorders have been found to
be predictive of poorer response. Duration of CBT is also important, with better
outcomes associated with more sessions. Such information is unavailable for
IH-CBT and depressed mothers in home visiting.
Delineating pretreatment variables that predict response to IH-CBT is an
important area for research for two reasons. First, depressed mothers in home
visiting display many of the characteristics associated with poorer response,
including unmarried status and significant morbidity (Ammerman, Putnam,
Chard, Stevens, & Van Ginkel, 2011). Second, such information can guide
modifications to IH-CBT that will lead to more effective treatment for this
high-risk population. The unique features of IH-CBT (provided in home set-
ting, integral collaboration between therapists and home visitors) may yield
different predictors than what has been found in studies that rely primarily on
adult clients of varied age, include males, report on treatments provided in
center-based settings, and without regard to parenting status.
The purpose of this study was to determine predictors of depression
outcome in a sample of depressed mothers who received concurrent home
visiting and IH-CBT. Mothers were enrolled in treatment between 2 and
10 months postpartum and assessed at pretreatment and posttreatment.
At posttreatment, mothers were categorized as asymptomatic or still
466 Behavior Modification 36(4)
symptomatic based on obtaining a score of ≤8 on the BDI-II (Keller, 2003).
These groups were contrasted on demographic, clinical, and treatment pro-
cess variables. As the theoretical foundation of IH-CBT relies heavily on
the close relationship between therapy and home visiting, number of home
visits was examined to determine its potential contribution to predicting
outcome. It was hypothesized that, relative to mothers who are symptom-
atic at posttreatment, asymptomatic mothers would be younger, have less
severe clinical indicators of depression at pretreatment, and receive more
IH-CBT sessions and home visits.
Method
Participants
Participants consisted of 60 new mothers aged 16 or older who participated in
a home visiting program, were diagnosed with MDD, enrolled between 2 and
10 months postpartum, and received IH-CBT as part of a clinical trial
(Ammerman, Putnam, Altaye, Stevens, & Van Ginkel, 2012). Mothers were
enrolled in Every Child Succeeds, a regional home visiting program serving
new mothers in Southwestern Ohio and Northern Kentucky. The geographic
area covered by the program included urban and rural areas. Two national
models of home visitation were utilized: Nurse–Family Partnership (NFP;
Olds, 2010) and Healthy Families America (HFA; Holton & Harding, 2007).
Participating mothers had at least one of four sociodemographic risk character-
istics needed for eligibility: unmarried, low income, age < 18 years, and inad-
equate prenatal care. Mothers were enrolled in home visiting prior to 28 weeks
gestation in NFP as per model parameters and from 20 weeks gestation through
the child reaching 3 months of age for HFA. In the NFP, home visits were
provided by nurses, whereas in HFA, home visits were provided by social
workers, related professionals, and paraprofessionals. The goals of home visi-
tation are to (a) improve pregnancy outcomes through nutrition education and
substance use reduction; (b) support parents in providing children with a safe,
nurturing, and stimulating home environment; (c) optimize child health and
development; (d) link families to health care and other needed services; and (e)
promote economic self-sufficiency (Ammerman, Putnam, et al., 2007).
Table 1 presents the demographic characteristics of the treated group. For
the sample as a whole, mothers were young (M = 22.4, SD = 5.0), predomi-
nantly Caucasian (61.6%) and African American (33.3%), unmarried
(86.7%), and low income (75.0% < US$20,000 annual household income). In
terms of home visitation model, 54 mothers were in the HFA model and 6 in
Ammerman et al. 467
the NFP model. Fifty-three mothers were primiparous and 7 (HFA only) had
more than one child.
Using the Structured Clinical Interview for DSM-IV (SCID) at pretreat-
ment assessment, the breakdown of MDD severity was mild = 20.0%, moder-
ate = 50.0%, and severe = 30.0%. Onset of the presenting episode during
postpartum (within 6 weeks after birth) was found in 26.7% of participants.
Recurrent depression was reported by 78.3% of mothers (M number of epi-
sodes = 2.9 [SD = 1.7], M age of first episode = 14.7 years [SD = 5.7]).
Comorbidity was high, with 76.3% of participants meeting criteria for other
psychiatric disorders.
Table 1. Demographic Characteristics of Sample (n = 60)
Variable M (SD) or n (%)
Mother age (years) 22.4 (5.0)
Mother race
White 37 (61.6%)
African American 20 (33.3%)
Native American 1 (1.7%)
Native Hawaiian or other Pacific Islander 1 (1.7%)
Biracial 1 (1.7%)
Mother ethnicity
Latina 4 (6.7%)
None 56 (93.3%)
Marital status
Single, never married 52 (86.7%)
Married 8 (13.3%)
Education (years) 11.5 (1.9)
Income (in US$)
0-9,999 33 (55.0%)
10,000-19,999 12 (20.0%)
20,000-29,999 11 (18.3%)
30,000-39,999 3 (5.0%)
40,000-49,999 0 (0.0%)
>50,000 1 (1.7%)
Child’s age (days) 152.0 (73.0)
Child gender
Male 28 (46.7%)
Female 32 (53.3%)
468 Behavior Modification 36(4)
Procedures
Mothers were recruited in a two-step process as part of a clinical trial of
IH-CBT. First, home visitors administered the Edinburgh Postnatal
Depression Scale (Cox, Holden, & Sagovsky, 1987) to mothers at 3 months
postpartum. Mothers who screened positive were approached to participate
in the trial. Interested mothers then received a pretreatment and eligibility
assessment. Inclusion criteria were age ≥16 years and current diagnosis of
MDD. Exclusion criteria were bipolar disorder, current substance depen-
dence, psychosis, mental retardation, suicidality or homicidality requiring
acute intervention, or current use of psychotropic medications or psycho-
therapy. Data are presented from the pretreatment and posttreatment
assessments. The sample included mothers originally assigned to IH-CBT
(n = 47) and those assigned to the control condition who subsequently
crossed over to IH-CBT (n = 13) at posttreatment based on continued diag-
nosis of MDD. Nine mothers were lost to posttreatment follow-up but were
included in analyses.
Home Visiting and IH-CBT
All mothers received ongoing services from home visitors as per the HFA
and NFP model directives while participating in IH-CBT. Both models call
for regular home visits during the intervals covered during the trial, and
home visitors are given discretion to increase frequency of visits if needed.
Curricula for both models are distinct, but each addresses child health and
development, nurturing mother–child relationship, maternal health and self-
sufficiency, and linkage to other community services.
IH-CBT was delivered in the home by two licensed, master’s level social
workers. Treatment consisted of 15 sessions that were scheduled weekly and
lasted 60 min plus a booster session 1 month posttreatment. Adaptations to
CBT were made to address setting, population, and context. These adapta-
tions were made based on a review of the literature, consultation with home
visitors, and input from mothers in home visitation. First, IH-CBT was deliv-
ered in the home. Creative solutions and accommodations were made to
ensure treatment delivery in home environments where privacy was some-
times difficult to ensure, the child was present, and unexpected interruptions
occurred. However, providing treatment in the home offered advantages in
that many of the clinical issues that were addressed in treatment occurred in
the home setting, and the therapist was able to observe elements of the home
Ammerman et al. 469
that may have been contributory to the clinical presentation. The second
adaptation involved addressing the primary concerns of young, low income,
new mothers who were socially isolated (Levy & O’Hara, 2010). Treatment
content focused on issues relevant to this population, such as transition to
adult roles, stress management, parenting challenges, and family relation-
ships. The third adaptation sought to facilitate close collaboration
(Zwarenstein, Goldman, & Reeves, 2009) with home visitors. Collaboration
occurred through weekly written communication between therapist and home
visitor utilizing a shared web-based documentation system, and/or telephone
contact as needed. In addition, the home visitor attended the 15th session
with the mother and therapist. Weekly supervision was provided by two doc-
toral level clinicians.
Measures
SCID Axis I Disorders (SCID-I). The SCID (January 2007 version; Spitzer,
Williams, Gibbon, & First, 1992) is a semistructured psychiatric interview that
is widely used in research and clinical practice. It is used to diagnose 14 com-
mon psychiatric disorders, including MDD. Interrater reliability is generally
high, ranging from 0.57 to 1.00 (Zanarini & Frankenburg, 2001), and validity
is well established (Shear et al., 2000). Interviews were audio-recorded and
25% were rated by a second rater yielding a kappa coefficient = .89. The SCID
was used to determine MDD diagnosis, comorbidities, and clinical features of
MDD, including age of onset and number of episodes.
BDI-II. The BDI-II (A. T. Beck, Steer, & Brown, 1996) is one of the most
widely used self-report screens of depressive symptomatology, with strong
reliability and validity properties. It consists of 21 items in which mothers
indicated presence and severity of depressive symptoms over the past 2
weeks by endorsing one of four statements reflecting degree of severity,
yielding a total score. The BDI-II was administered at pretreatment and post-
treatment. Participants were categorized as asymptomatic (BDI-II ≤ 8) or
symptomatic (BDI-II ≥ 9) at posttreatment (Keller, 2003).
Childhood Trauma Questionnaire (CTQ). The CTQ (Bernstein et al., 2003) is a
28-item version of the larger CTQ. Items describe maltreatment experiences
in childhood and are endorsed on a 5-item Likert-type scale reflecting how
true they are. Scores reflect physical abuse, sexual abuse, emotional abuse,
physical neglect, and emotional neglect. The CTQ has excellent internal reli-
ability (α = .61-.94 in clinical and community samples) and correlates highly
470 Behavior Modification 36(4)
with determinations of maltreatment (Scher, Stein, Asmundson, McCreary, &
Forde, 2001). The CTQ was analyzed using the total raw score.
Iowa Personality Disorder Screen (IPDS). The IPDS (Langbehn et al., 1999)
is a brief, 11-item screen for symptoms of personality disorders. It is admin-
istered as an interview, and each item is endorsed as yes/no based on reports
consistent with symptoms suggestive of personality disorders (e.g., “feels
uncomfortable in situations where he or she is not the center of attention”). A
total score is derived reflecting the number of items rated as “yes.” The IPDS
has acceptable psychometric characteristics, including adequate sensitivity
and specificity (Trull & Amdur, 2001).
Results
Overview of Analyses
Based on the number of mothers available for posttreatment assessment,
asymptomatic (n = 33, 64.7%) and symptomatic (n = 18, 35.3%) groups were
formed using the BDI-II ≤ 8 as the criterion. Missing data were handled via
maximum likelihood estimation with a saturated correlates model (Enders,
2010). Handling missing data via maximum likelihood estimation assumes
that these data are missing at random (MAR), meaning the missing data are
related to the variables included in the analysis model. There is no formal test
for MAR, but increasing the number of variables in the analysis model tends
to make the MAR assumption more plausible. A saturated correlates model
allows additional variables to be added to the analysis model without biasing
parameter estimates of interest. Accordingly, selected demographics were
added to the analysis model as additional correlates of missing data.
Asymptomatic and symptomatic groups were contrasted using MANOVA
and Wald Z values with accompanying Cohen’s d effect size estimates. Next,
a hierarchical linear regression was conducted to determine the relative con-
tributions of previously identified determinants of endpoint symptom status
to reduction in BDI-II scores from pre- to posttreatment. All analyses were
conducted using Mplus version 6.12 (Muthen & Muthen, 2010).
Table 2 presents contrasts for the asymptomatic and symptomatic groups
using a maximum likelihood estimation with saturated correlates model for
the full sample (n = 60). Maternal demographics, pretreatment and historical
clinical characteristics, and intervention parameters (number of IH-CBT ses-
sions and number of home visits) were examined. Race, income, and marital
status were added as missing data correlates to improve the accuracy of the
471
Table 2. Means and SDs for Asymptomatic and Symptomatic Groups and Results From Comparisons Using MANOVA
Variable Asymptomatic Symptomatic M difference SE Wald Z95% CI Cohen’s d
Mother age 22.30 (4.72) 23.50 (4.85) −1.20 0.72 −1.67* [−2.06, −0.15] 0.53
Mother education 11.61 (3.41) 11.56 (3.40) 0.05 0.19 0.27 [−0.21, 0.29] 0.03
CTQ 59.18 (7.69) 61.56 (7.65) −2.37 3.60 −0.66 [−7.90, 1.94] 0.50
Age 1st episode 15.06 (3.88) 14.80 (3.85) 0.27 1.44 0.19 [−1.04, 2.87] 0.11
# MDD episodes 2.74 (1.65) 3.18 (1.78) −0.44 0.16 −2.77** [−0.39, −0.01] 0.33
# Diagnoses 1.85 (1.36) 2.00 (1.41) −0.15 0.13 −1.19 [−0.23, 0.12] 0.12
BDI-II pre-treatment 33.46 (5.78) 36.39 (6.03) −2.93 1.44 −2.04* [−5.03, −1.56] 0.95
IPDS 4.67 (2.16) 5.83 (2.42) −1.17 0.43 −2.73** [−1.80, −0.75] 0.76
# IH-CBT sessions 13.12 (3.62) 10.94 (3.31) 2.18 0.77 2.83** [1.42, 3.28] 1.04
# Home visits 13.94 (3.73) 8.83 (3.97) 5.11 0.55 9.37** [4.39, 5.94] 2.27
Note: CI = confidence interval; CTQ = Childhood Trauma Questionnaire; MDD = major depressive disorder ; BDI-II = Beck Depression Inven-
tory–II; IPDS = Iowa Personality Disorder Screen; IH-CBT = In-Home Cognitive-Behavioral Therapy.
*p < .05. **p < .01 based on Wald Z values > ±1.645; 95% CI’s based on 1,000 bootstrap samples.
472 Behavior Modification 36(4)
estimates. Marital status was not considered given that most of the sample was
unmarried. MANOVA revealed six variables that were statistically significant
and differentiated asymptomatic and symptomatic groups. In contrast with
mothers who still had clinically elevated levels of depression at posttreatment,
asymptomatic mothers were younger, had fewer lifetime episodes of MDD,
had lower BDI-II scores at pretreatment, had lower levels of symptoms sug-
gesting a personality disorder, and received more IH-CBT sessions and home
visits during the treatment interval. Effect sizes were medium to large in size,
with particularly noteworthy effect sizes emerging for number of treatment
sessions and number of home visits. Taken together, a variety of participant
characteristics and service parameters separately contributed to predicting a
low level of depressive symptoms at posttreatment.
Regarding number of home visits, follow-up analyses indicated that this
effect was particularly evident during the first half of treatment. Although
asymptomatic mothers received more home visits than their symptomatic
counterparts during the first half (t = 4.32, p < .001) and second half (t = 2.11,
p < .05) of treatment, the gap was most evident during the first half (M home
visits = 8.20 [SD = 3.44] vs. 4.54 [SD = 2.41]; Cohen’s d effect size estimate
= 2.08) than the second half (M home visits = 6.52 [SD = 3.28] vs. 4.58
[SD = 3.16]; Cohen’s d effect size estimate = 1.08). Thus, although increased
home visits were observed throughout the treatment interval, mothers who
were asymptomatic at posttreatment received almost twice as many home
visits in the first half of treatment than those who ended in the symptomatic
category. The inverse relationship between number of home visits and post-
treatment BDI-II scores is further elucidated in Figure 1 which shows the
scatterplot with fitted trend line for number of home visits and endpoint
BDI-II scores.
A hierarchical linear regression was next conducted to identify predictors
of posttreatment BDI-II scores while considering the demographic, clinical,
and intervention process variables that emerged from the group contrasts.
Pretreatment BDI-II scores and number of home visits received prior to com-
mencement of IH-CBT were also included. Table 3 presents results of the
regression (F = 5.87, p < .001, R2 = .446). Two variables emerged as statisti-
cally significant (p < .05) predictors in the full model: number of home visits
and symptoms of personality disorders as measured by the IPDS. Number of
IH-CBT sessions approached (p = .08) but did not reach statistical signifi-
cance. Despite this, results from the regression indicate that number of
IH-CBT sessions and home visits contribute uniquely to positive depression
outcomes.
Ammerman et al. 473
Table 3. Results of Hierarchical Linear Regression Predicting Posttreatment BDI-II
Scores
b SE p value 95% CI (b)
BDI-II pre-treatment 0.21 0.22 0.17 [−0.23, 0.62]
Pre-txt home visits −0.15 0.21 0.22 [−0.57, 0.24]
Mother age 0.34 0.39 0.20 [−0.58, 0.99]
IPDS 1.91 0.88 0.02* [0.11, 3.47]
# MDD episodes 1.10 1.41 0.21 [−2.62, 2.95]
# IH-CBT sessions −0.90 0.63 0.08 [−2.19, 0.27]
# Home visits −0.78 0.42 0.03* [−1.52, 0.18]
Note: CI = confidence interval; BDI-II = Beck Depression Inventory–II; IPDS = Iowa Personality
Disorder Screen; MDD = major depressive disorder; IH-DBT = In-Home Cognitive-Behavioral
Therapy.
*p < .05. 95% CIs computed based on 1,000 bootstrap samples.
Figure 1. Scatterplot showing association between number of home visits and
posttreatment BDI-II scores
Note: BDI-II = Beck Depression Inventory–II. R2 = .19.
474 Behavior Modification 36(4)
Discussion
This study identified predictors of treatment outcome in depressed mothers
who received IH-CBT and concurrent home visiting. IH-CBT is unique in
that it is an adapted treatment that was designed to be engaging, relevant, and
effective for new mothers participating in home visiting programs. Results
showed that 64.7% of treated mothers obtained a posttreatment BDI-II score
of ≤8 indicative of asymptomatic status, a pattern consistent with other effec-
tive treatments for perinatal depression (Sockol, Epperson, & Barber, 2011).
Delineating predictors of reaching a clinical threshold indicative of positive
treatment response is important to refining and improving IH-CBT. In addi-
tion, predictors can be used a priori to develop treatment plans for mothers
who may be expected to respond more or less robustly to IH-CBT. As
hypothesized, a number of variables emerged as predictive of treatment out-
come involving demographic, clinical, and intervention process factors.
Consistent with hypotheses, number of IH-CBT sessions was predictive
of better depression outcomes. Yet, the most robust predictor was number
of home visits. Mothers who received increased home visits during treat-
ment were more likely to be asymptomatic at posttreatment than those with
fewer home visits even when controlling for frequency of home visits prior
to treatment and other predictor variables (including number of IH-CBT
sessions). IH-CBT is distinctive in that it is designed to be implemented
alongside home visiting. A close working relationship between therapists
and home visitors is posited to be essential to optimal outcomes. Number of
home visits is a reasonable proxy of the strength of this collaborative effort.
As such, results suggest that the active involvement of home visitors with
mothers during the treatment interval, and particularly during the first half
of treatment, propels mothers toward lower depression severity at posttreat-
ment. It is possible that the increased frequency of home visits works syn-
ergistically with treatment to bring about better outcomes, which would be
consistent with the theoretical foundation of IH-CBT. An alternative expla-
nation is that mothers who are on a trajectory toward improvement are more
engaged in home visiting and seek additional contact with home visitors.
However, home visitors may be drawn to mothers who are emerging from
a depressive state. They may capitalize on mothers’ increased energy and
interest by increasing home visit frequency. There may also be an unknown
variable that is associated with increased home visits and IH-CBT treat-
ment sessions that contributes to better outcomes. Although home visitors
strive to follow a schedule of visits as dictated by home visiting models,
there is substantial variability in intensity of service due to maternal
Ammerman et al. 475
willingness and availability and perceived need. Findings from this study
suggest that, for depressed mothers who receive IH-CBT treatment, consis-
tent and regular contact by home visitors is associated with more robust
decreases in depressive symptoms.
Other variables also predicted posttreatment depression. Younger moth-
ers were more likely to be asymptomatic than their older counterparts. In
the larger literature on adults treated for MDD with psychotherapy (includ-
ing CBT) or medications, findings have been mixed (Driessen & Hollon,
2010). Most recently, Fournier et al. (2009) found that younger adults were
more responsive to CBT than older adults. Similarly, the Treatment for
Adolescents With Depression Study (TADS; Curry et al., 2006) found that
younger adolescents had superior outcomes following treatment than older
peers. It is not clear why younger age is associated with improved out-
comes, and this finding warrants continued research. It is possible that less
experience with depression improves responsiveness to IH-CBT treatment.
To this end, it is noteworthy that age was not a significant contributor to
posttreatment BDI-II scores when considered alongside other predictors,
such as number of MDD episodes.
Severity emerged as a predictor of posttreatment depression, at least in the
form of number of MDD episodes and symptoms of personality disorders.
Depression chronicity, reflected in part by number of episodes, has been con-
sistently found to be associated with less improvement in CBT treatment.
Chronicity may reflect a more recalcitrant form of depression. Likewise, there
is evidence that repeated episodes increase susceptibility to subsequent depres-
sion (Monroe & Harkness, 2011), which may in turn diminish treatment effec-
tiveness. Baseline severity was also associated with a less robust response to
treatment. For mothers who have higher pretreatment levels of depression and
more episodes, they may require additional treatment. Age of onset, a variable
reflecting illness severity that has been found to be related to treatment
outcome in other adult populations, was not a significant predictor of post-
treatment depressive levels in mothers receiving IH-CBT. In this population of
young, low income, new mothers it is not a useful indicator of treatment
response. In contrast, increased symptoms of personality disorders predicted
less improvement, and this variable was significant even after controlling for
other predictors in a regression model. Personality disorders, particularly
those reflecting a submissive personality style, are associated with chronicity
of depression (Cain et al., 2011). Although CBT treatment specifically focused
on adults with personality disorders has been found to be efficacious
(Matusiewicz, Hopwood, Banducci, & Lejuez, 2010), the co-occurrence of
MDD and personality disorders has been found to be detrimental to outcomes
476 Behavior Modification 36(4)
in adults receiving depression-focused CBT (Fournier et al., 2008). As with
chronicity, additional IH-CBT sessions or a more direct focus on personality
disorder mechanisms may be needed to boost outcomes for mothers in home
visiting programs. Finally, in contrast, history of childhood trauma (which was
widely represented in the sample) did not predict differential levels of post-
treatment depression.
This is the first study to examine predictors of outcomes in IH-CBT, and one
of the few efforts that focused on depressed mothers who were young, had low
income, and were new parents. The study had a number of strengths. First, an
array of theoretically meaningful predictors was examined reflecting demo-
graphic, clinical, and intervention process variables. Second, multiple measure-
ment strategies were used, including self-report and clinical interview. Third,
maximum likelihood estimation with a saturated correlates model was used to
address missing data and take advantage of the full sample. Fourth, two widely
disseminated models of home visitation were represented in the sample thereby
facilitating generalizability of findings.
There are also several limitations that warrant caution in interpreting find-
ings. First, the sample size was relatively small, limiting statistical power.
Second, determination of asymptomatic versus symptomatic status at posttreat-
ment is one of several ways that treatment response can be described. Others
include recovery or remission (Keller, 2003), both of which require an extended
interval during which depressive symptoms remain below a preestablished
level of clinical significance. The predictors found in the current study may not
necessarily emerge under different definitions of treatment response. Third,
although the IPDS is a psychometrically acceptable screen for symptoms of
personality disorders, it is not a substitute for more comprehensive clinical
interviews that more definitively diagnose specific personality disorders.
Fourth, although number of IH-CBT sessions and home visits were considered,
quality of services was not addressed.
Findings from this study have important implications for clinical practice
in the treatment depression in new mothers participating in home visiting
programs. A high rate of IH-CBT treatment sessions and home visits, admin-
istered concurrently, are likely to bring about the most robust reductions in
depressive symptoms. As IH-CBT explicitly promotes and facilitates collab-
oration between therapists and home visitors, it is better able to create this
synergistic effect than other treatments. Depression treatment received in the
community is less likely to produce the close working relationship between
clinicians and home visitors, given structural and logistical barriers. Several
pretreatment and historical features of depression (e.g., personality disorder
symptoms, number of MDD episodes) may indicate a need for additional
Ammerman et al. 477
treatment, although this is an empirical question that awaits additional
research. Results from this study underscore the need to conduct research on
new mothers participating in home visiting programs separately given that
findings from studies of other adult populations may not be generalizable to
this population.
Authors’ Note
Frank W. Putnam is now at the Department of Psychiatry, University of North
Carolina School of Medicine.
Acknowledgments
The authors acknowledge the participation and support of The Health Foundation of
Greater Cincinnati, United Way of Greater Cincinnati, Kentucky H.A.N.D.S., Ohio
Help Me Grow, and www.OhioCanDo4Kids.org.
Declaration of Conflicting Interests
The author(s) declared no potential conflicts of interest with respect to the research,
authorship, and/or publication of this article.
Funding
The author(s) disclosed receipt of the following financial support for the research,
authorship, and/or publication of this article: This study was supported by Grant
R34MH073867 from the National Institute of Mental Health.
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Bios
Robert T. Ammerman, PhD, is a professor of pediatrics in the Behavioral Medicine
and Clinical Psychology Division and scientific director of Every Child Succeeds at
Cincinnati Children’s Hospital Medical Center. His research interests are enhance-
ment of early prevention programs, treatment of maternal depression, and quality
improvement in prevention.
James L. Peugh, PhD, is an assistant professor of pediatrics in the Behavioral
Medicine and Clinical Psychology Division at Cincinnati Children’s Hospital
Medical Center. His research interests include Monte Carlo simulations in cross-
sectional, longitudinal, and multilevel mixture structural equation models, missing
data handling, and dyadic data analysis.
Frank W. Putnam, MD, is a professor of psychiatry at the University of North
Carolina. His research focuses on the implementation of scalable interventions for
prevention and treatment of child maltreatment in a variety of settings.
Judith B. Van Ginkel, PhD, is a professor of pediatrics and president of Every Child
Succeeds at Cincinnati Children’s Hospital Medical Center. Her research interests are
effectiveness of home visiting programs and early childhood policy.
    • This was associated with decreased costs in medical care. Although home visiting by itself has limited impact on maternal depressive symptoms (Green et al., 2014), we have argued that the strong collaborative relationship between IH-CBT therapists and home visitors contributes to improved outcomes in depression (Ammerman et al., 2012). It is possible that this synergy in services is also a driver of improved cost-effectiveness.
    [Show abstract] [Hide abstract] ABSTRACT: Background: To determine the cost-effectiveness of In-Home Cognitive Behavioral Therapy (IH-CBT) for low-income mothers enrolled in a home visiting program. Methods: A cost-utility analysis was conducted using results from a clinical trial of IH-CBT and standard of care for depression derived from the literature. A probabilistic, patient-level Markov model was developed to determine Quality Adjusted Life Years (QALYs). Costs were determined using the Medical Expenditure Panel Survey. A three-year time horizon and payer perspective were used. Sensitivity analyses were employed to determine robustness of the model. Results: IH-CBT was cost-effective relative to standard of care. IH-CBT was expected to be cost-effective at a three-year time horizon 99.5%, 99.7%, and 99.9% of the time for willingness-to-pay thresholds of US$25,000, US$50,000, and US$100,000, respectively. Patterns were upheld at one-year and five-year time horizons. Over the three-year time horizon, mothers receiving IH-CBT were expected to have 345.6 fewer days of depression relative to those receiving standard home visiting and treatment in the community. Conclusions: IH-CBT is a more cost-effective treatment for low-income, depressed mothers than current standards of practice. These findings add to the growing literature demonstrating the cost-effectiveness of CBT for depression, and expand it to cover new mothers. From a payer perspective, IH-CBT is a sound option for treatment of depressed, low-income mothers. Limitations include a restricted time horizon and estimating of standard of care costs.
    Full-text · Article · Nov 2016
    • A randomised-controlled trial of cognitive–behavioural therapy for anxious or depressed pregnant women is being conducted [79]. New models of perinatal care are being developed [80], and evidence shows that interventions delivered in the home setting may be especially helpful [81].
    [Show abstract] [Hide abstract] ABSTRACT: Care for the emotional state of pregnant women remains a neglected aspect of obstetric medicine. Many prospective studies have shown that, if a mother is depressed, anxious, or stressed while pregnant, this increases the risk for her child having a wide range of adverse outcomes, including emotional problems, symptoms of attention deficit hyperactivity disorder, or impaired cognitive development. Although genetics and postnatal care clearly affect these outcomes, evidence for an additional prenatal causal component is substantial. Prenatal anxiety or depression may contribute 10-15% of the attributable load for emotional and behavioural outcomes. The Nurse Family Partnership remains the only intervention that starts in pregnancy and has been shown to have long-term benefits for the behaviour of the child. Several other interventions, however, are likely to be helpful. Depression, anxiety, and stress during pregnancy are frequently undetected by health professionals, and untreated. Programmes to help with this should eventually improve child outcome.
    Full-text · Article · Sep 2013
    • Depressed mothers in home visiting rarely obtain effective and evidence-based treatment in the community (e.g., Administration on Children, Youth and Families, 2002). Interventions that specifically target depression in at-risk mothers participating in home visiting programs and lower the barriers to accessing care (Ammerman, Peugh, Putnam, & Van Ginkel, 2012 ) have the potential to both improve mood and decrease parenting stress. Likewise, social support is a second distinct pathway to parenting stress that can be the focus of intervention.
    [Show abstract] [Hide abstract] ABSTRACT: Parenting stress is associated with poor maternal and child outcomes. Multiple contributors to parenting stress have been proposed, but disaggregation of distinct pathways has been relatively unexplored. In addition, the contribution of maternal experience of childhood trauma has been inadequately considered. Childhood trauma and parenting stress are common in mothers in home visiting programs. Understanding the relation between childhood trauma and parenting stress holds promise for improvement of home visiting approaches. This study examined the relation between childhood trauma and parenting stress, with a focus on the mediating roles of depression and social support. Participants consisted of 208 first-time mothers enrolled in a home visiting program who were assessed at about 5 months' postpartum. Measures of maternal childhood trauma, depression, social support, and parenting stress were administered. A multiple mediator model revealed that childhood trauma was related to parenting stress, and the relation between childhood trauma and parenting stress was separately mediated by both depression and social support. Depression and social support uniquely and distinctly accounted for the association between childhood trauma and parenting stress. Home visiting programs may improve their impact on parenting stress by augmenting or modifying strategies to more effectively address maternal depression and social support.
    Full-text · Article · May 2013
    • This process is likely facilitated by home visitors, who are encouraged to help mothers strengthen natural social ties and relationships. Indeed, number of home visits is associated with improved depression outcomes in mothers receiving IH-CBT (Ammerman, Peugh, Putnam, & Van Ginkel, 2012). It is notable that the affiliation and affirming subscales of the ISEL improved over time in IH-CBT compared to SHV mothers, but group differences were not found in the Tangible subscale at post-treatment or follow-up.
    [Show abstract] [Hide abstract] ABSTRACT: Objectives: Depression is prevalent in mothers receiving home visiting. Little is known about the impact of treatment on associated features of maternal depression in this population. The purpose of this study was to examine the impact of a novel, adapted treatment for depressed mothers in home visiting on psychological distress and social functioning. Methods: In-Home Cognitive Behavioral Therapy (IH-CBT) was developed to treat depressed mothers in home visiting. A randomized clinical trial design was used in which subjects were 93 new mothers in a home visiting program. Mothers with major depressive disorder identified at 3 months postpartum were randomized into IH-CBT and ongoing home visiting (n = 47) or standard home visiting (SHV; n = 46) in which they received home visitation alone and could obtain treatment in the community. Measures of psychological distress, social support, and social network were measured at pre-treatment, post-treatment, and three-month follow-up. Clinical features of depression and home visiting parameters were examined as potential moderators. Results: Subjects receiving IH-CBT reported decreased psychological distress at post-treatment (ES = 0.77) and follow-up (ES = 0.73). Examination of types of psychological distress indicated broad improvements at both time points. Those receiving IH-CBT reported increased social support over time relative to those in the SHV condition. Effect sizes were modest at post-treatment (ES = 0.38) but increased at follow-up (ES = 0.65). Improvements were seen in affiliative and belonginess aspects of social support, in contrast to tangible support which was statistically non-significant. Findings were not moderated by clinical features of depression or home visiting parameters. No group differences were found in size of and involvement with social networks. Conclusions: IH-CBT is effective in reducing psychological distress and improving perceived social support in depressed mothers receiving home visiting. To the extent that mothers are better adjusted and feel socially supported, they are more available to their children and more amenable to home visiting services. IH-CBT is a feasible, readily adopted treatment that is compatible with multiple home visiting models. As a result it is a promising approach to help depressed mothers in home visiting. Additional interventions may be needed to support depressed mothers in building sizable and stable social networks.
    Full-text · Article · Apr 2013
  • Full-text · Article · Jul 2012
  • Full-text · Article · Jan 2014 · Child abuse & neglect
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