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ABSTRACT: OBJECTIVE: Response shift methods have developed substantially in the past decade, with a notable emphasis on model-based methods for response shift detection that are appropriate for the analysis of existing data sets. These secondary data analyses have yielded useful insights and motivated the continued growth of response shift methods. However, there are also challenges inherent to the successful use of secondary analysis for response shift detection. Based on our experience with a number of secondary analyses, we propose guidelines for the optimal implementation of secondary analysis for detecting response shift. METHODS: We review the definition of response shift and recent advances in response shift theory. We describe current statistical methods that have been developed for or applied to response shift detection. We then discuss lessons learned when using these methods to test specific hypotheses about response shift in existing data and of the features of a data set that could guide early decision-making about undertaking a secondary analysis. RESULTS: A checklist is provided that includes guidelines for secondary analyses focusing on: (1) selecting an appropriate data set to investigate response shift; (2) prerequisites of data sets and their preparation for analysis; (3) managing missing data; (4) confirming that the data fit the requirements and assumptions of the selected response shift detection technique; (5) model fit evaluation; (6) interpreting results/response shift effect sizes; and (7) comparing findings across methods. CONCLUSIONS: The guidelines-checklist has the potential to stimulate rigorous and replicable research using existing data sets and to assist investigators in assessing the appropriateness and potential of a data set and model-based methods for response shift research.
Quality of Life Research 04/2013; · 2.30 Impact Factor
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David C van der Zee, Daniel C Aronson,
Gerard C Madern,
Zacharias J De Langen,
N Looyaard,
Marianne J G Hanneman,
Paul N M A Rieu,
Esther E Hartman,
Mirjam A G Sprangers,
Frans J Oort,
L W Ernest van Heurn,
M van Silfhout-Bezemer
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ABSTRACT: This study examined the assumption of measurement invariance of the SAMSHA Mental Health and Alcohol Abuse Stigma Assessment. This is necessary to make valid comparisons across time and groups. The data come from the Primary Care Research in Substance Abuse and Mental Health for Elderly trial, a longitudinal multisite, randomized trial examining two modes of care (Referral and Integrated). A sample of 1,198 adults over the age of 65 who screened positive for depression, anxiety, and/or at-risk drinking was used. Structural equation modeling was used to assess measurement invariance in a two-factor measurement model (Perceived Stigma, Comfort Level). Irrespective of their stigma level, one bias indicated that with time, respondents find it easier to acknowledge that it is difficult to start treatment if others know they are in treatment. Other biases indicated that sex, mental quality of life and the subject of stigma had undue influence on respondents' feeling people would think differently of them if they received treatment and on respondents' comfort in talking to a mental health provider. Still, in the present study, these biases in response behavior had little effect on the evaluation of group differences and changes in stigma. Stigma decreased for patients of both the Referral and Integrated care groups.
Ageing International 12/2012; 37(4):441-458.
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ABSTRACT: Children with asthma are thought to have impaired sleep quality and quantity. In this study we investigated which of many sleep aspects are associated with asthma.The sample consisted of 2529 children (11 years) who participated in the Prevention and Incidence of Asthma and Mite Allergy (PIAMA) birth cohort study. Parents reported about asthma symptoms (wheezing, dyspnoea, prescription of inhaled corticosteroids, asthma diagnosis) and children reported about different aspects of sleep (bedtime, rise time, sleep quality, daytime sleepiness/tiredness). Results were analysed with (logistic) regression analysis.Children with frequent asthma symptoms significantly more often reported that they felt sleepy or tired during the day (34.4% experienced daytime sleepiness/tiredness at least once a week) than children without asthma symptoms (22.2%), and children with infrequent asthma symptoms (21.9%). This association was not confounded by gender, age of the child, parental educational level, or smoking inside the house; nor was the effect modified by gender. There were no associations between asthma and bedtime, time spent in bed or sleep quality.Children with frequent asthma symptoms more often experienced daytime sleepiness/tiredness than children with infrequent or no asthma symptoms. Children with asthma did otherwise not differ much from children without asthma with regard to sleep.
European Respiratory Journal 08/2012; · 5.89 Impact Factor
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ABSTRACT: Critical factors affecting the quality of life of children and adolescents with anorectal malformations or Hirschsprung’s disease
The first objective of this article was to examine differences in quality of life (QoL), disease-specific functioning, and
psychosocial competencies of children and adolescents with anorectal malformations (ARM) or Hirschsprung’s disease (HD), and
to compare the QoL and psychosocial functioning of these patients with healthy peers. The second objective was to identify
predictors of QoL. 316 patients (8-16 years) with ARM or HD filled out a questionnaire, which assessed QoL (mental, physical),
disease-specific functioning (defecation-related), psychosocial competencies (self-esteem, athletic-competencies, school-attitude)
and demographic characteristics (gender, age). Clinical variables were extracted from medical records (disease-severity, additional
congenital anomalies). The results showed no differences in QoL, disease-specific and psychosocial functioning between disease-groups
(ARM versus HD). Compared to healthy peers, children reported several QoL problems and impaired functioning in almost all
psychosocial functioning domains, whereas the adolescents reported no problems with QoL or with psychosocial functioning.
Disease-specific and psychosocial functioning both predicted QoL, with the strongest effects of school-attitude. To conclude,
improving disease-specific functioning and enhancing psycho-
Psychologie & gezondheid 04/2012; 34(4):174-184. · 0.17 Impact Factor
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ABSTRACT: The purpose of this research was to develop and test a model of effective self-regulated learning. Based on effort expenditure
we discerned effective self-regulators and less effective self-regulators. The model comprised achievement goals (mastery,
performance-approach and -avoidance goals), metacognition (metacognitive knowledge, regulation and experience), study strategies
(metacognitive, deep cognitive, surface cognitive and resource management strategies) and academic achievement. The relationships
in the model were tested with controlling for intellectual ability, gender and age. The results showed that effective self-regulated
learning involved two pathways: a metacognitive and a strategy pathway. The first pathway involved a positive relationship
of mastery goals and a negative relationship of performance-avoidance goals with metacognition. Metacognition positively affected
the use of the four study strategies. The strategy pathway involved positive effects of mastery and performance-approach goals
on the use of metacognitive and deep cognitive strategies. Further, performance-approach goals positively affected the use
of surface cognitive and resource management strategies. The use of metacognitive and resource management strategies had a
positive and the use of surface cognitive strategies had a negative effect on exam scores.
Metacognition and Learning 04/2012; 3(2):123-146. · 0.97 Impact Factor
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ABSTRACT: Adolescents of single and/or chronically ill parents (target groups) reportedly have elevated psychological stress. However, their salivary cortisol pattern as part of the physiological stress system has not been compared to controls. The aim of this study is to examine differential outcomes in the diurnal cortisol pattern of the target groups.
In total, 100 adolescents of three groups with either single, chronically ill or two healthy parents were compared on cortisol. Three salivary cortisol samples were taken after awakening, one sample at noon and one sample at 20:00 p.m. during a non-school day. Group differences and interaction effects between measurement (5 times), group membership and covariates were tested through linear mixed modeling, repeated measures. Covariates were children's sex and age, socioeconomic status (SES) and parental depression as measured with the Beck Depression Inventory.
The three groups did not differ significantly concerning the amount of salivary cortisol, even after controlling for the covariates. The target groups had a lower SES than adolescents with two healthy parents. In addition, chronically ill parents were more depressed than single and healthy parents. Male sex and older age of the child, and lower parental depression were associated with increased cortisol values throughout the day.
Research on cortisol in children should control for children's sex and age, and parental depression. Adolescents with single and/or chronically ill parents displayed a healthy pattern of diurnal salivary cortisol.
Journal of psychosomatic research 04/2012; 72(4):288-92. · 2.91 Impact Factor
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ABSTRACT: Although adolescents often experience insufficient and/or poor sleep, sleep variables such as total sleep time do not account for individuals' sleep need and sleep debt and may therefore be an inadequate representation of adolescents' sleep problems and its daytime consequences. This problem can be overcome by using the Chronic Sleep Reduction Questionnaire (CSRQ), an assessment tool that measures symptoms of chronic sleep reduction and therefore accounting for sleep need and sleep debt. The present study aims at developing an English version of the CSRQ and assesses the reliability and validity of the Dutch and the English CSRQ version. The CSRQ was administered in large Dutch (n = 166, age = 15.2 ± 0.57 years, 28% male) and Australian (n = 236, age = 15.5 ± 0.99 years, 65% males) samples. Subjective sleep variables were measured with surveys and sleep diaries of five school nights. Additionally, sleep of the same five nights was monitored with actigraphy. Both CSRQ versions showed good psychometric properties concerning their reliability (Dutch: α = 0.85; English: α = 0.87) and validity as the same overall structure of the two CSRQ versions and significant correlations with subjective and objective sleep variables were found. School grades were related to chronic sleep reduction, whereas the relationship between grades and other sleep variables was weak or absent. These results highlight the idea that chronic sleep reduction may be a better indicator of adolescents' insufficient and/or poor sleep than other sleep variables such as total sleep time.
Journal of Sleep Research 02/2012; 21(5):584-94. · 3.16 Impact Factor
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ABSTRACT: OBJECTIVE: This study aims to explain bodily pain using the Sprangers and Schwartz theoretical model (1999) on quality of life (QL) and response shift in its entirety. Response shift refers to the phenomenon that the meaning of a person's self-evaluation changes over time. In this model, response shift mediates effects of changes in health status (catalysts), stable characteristics of the person (antecedents), and coping mechanisms (mechanisms) on QL. METHODS: Cancer patients (202) were assessed prior to and 3 months following surgery. Measures were for catalysts: type of operation and possibility of tumor resection; for antecedents: age, duration of pain, optimism, and rigidity; for mechanisms: post-traumatic growth, social comparisons, social support, denial, and acceptance; and for QL: bodily pain; for response shift: the pretest-minus-thentest bodily pain score, further referred to as recalibration response shift. Structural equation modeling and sequential regression analyses were used. RESULTS: The final model reached close fit (RMSEA = 0.03; 90% CI = 0.000-0.071; χ2 (18) = 21.13; p = 0.27). Significant effects were found for catalysts on mechanisms, antecedents on mechanisms, mechanisms on response shift, and response shift on bodily pain. Four extra model effects had to be permitted. Using sequential regression analysis, recalibration response shift added 4.4% to the total amount of 29.8% explained variance of bodily pain. CONCLUSIONS: Many effects as hypothesized by the model were found. Recalibration response shift had a unique albeit small contribution to the explanation of bodily pain. Copyright © 2012 John Wiley & Sons, Ltd.
Psycho-Oncology 01/2012; · 3.34 Impact Factor
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ABSTRACT: OBJECTIVE: If the assumption of measurement invariance is not tested, we cannot be sure whether differences observed are due to true differences in health-related quality-of-life (HRQoL), or are measurement artifacts. We aim to investigate this assumption in a sample of heterogeneous cancer patients, focusing on whether age, sex, previous treatment for cancer, and information regarding treatment preferences result in biased HRQoL scores. METHODS: 155 cancer patients who were about to begin their first session of radiotherapy were included. HRQoL was measured using the EORTC QLQ-C30. Structural equation modeling was applied to assess whether there was a violation of the assumption of invariance. RESULTS: A satisfactory single construct (Functioning HRQoL) measurement model was found and two violations of invariance were identified. Irrespective of patients' Functioning HRQoL, older patients reported worse physical functioning and patients who had received treatment prior to radiotherapy reported worse emotional functioning than we would otherwise expect. CONCLUSIONS: In the present study, accounting for measurement bias lead to a substantial improvement in the overall fit of the model. By ignoring the bias, we would have concluded that the model fit was unsatisfactory. The findings underline the importance of investigating measurement invariance in scales designed for heterogeneous samples.
Quality of Life Research 12/2011; · 2.30 Impact Factor
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ABSTRACT: With the evolution of theory and methods for detecting recalibration, reprioritization, and reconceptualization response shifts, the time has come to evaluate and compare the current statistical detection techniques. This manuscript presents an overview of a cross-method validation done on the same patient sample.
Three statistical techniques were used: Structural Equation Modeling, Latent Trajectory Analysis, and Recursive Partitioning and Regression Tree modeling. The study sample (n = 3,008) was drawn from the North American Research Committee on Multiple Sclerosis (NARCOMS) Registry to represent patients soon after diagnosis, classified as having either a self-reported relapsing, progressive, or stable disease trajectory. Patient-reported outcomes included the disease-specific Performance Scales and the Patient-Derived Disease Steps, and the generic SF-12v2 measure.
Small response shift effect sizes were detected by all of the methods. Recalibration response shift was detected by Structural Equation Modeling, Recursive Partitioning Regression Tree demonstrated patterns consistent with all three types of response shift, and Latent Trajectory Analysis, although unable to distinguish types of response shift, did detect response shift in less than 1% of the sample.
The methods and their findings were discussed for operationalization, interpretability, assumptions, ability to use all data points from the study sample, limitations, and strengths. Directions for future research are discussed.
Quality of Life Research 11/2011; 20(10):1561-72. · 2.30 Impact Factor
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ABSTRACT: To investigate the effects of termination of short term melatonin treatment on sleep, health, behavior, and parenting stress in children with delayed Dim Light Melatonin Onset.
Forty-one children (24 boys, 17 girls; mean age=9.43 years) entered melatonin treatment for 3 weeks and then discontinued treatment by first taking a half dose for 1 week and then stopping completely for another week. Sleep was measured with sleep diaries filled in by parents and with actometers worn by children. Analyses were conducted with linear mixed models.
Sleep latency was longer during the stop week compared to the treatment weeks. Sleep start was later and actual sleep time was shorter during the half dose and stop weeks compared to the treatment weeks. Sleep efficiency deteriorated in the stop week. Dim Light Melatonin Onset was earlier after treatment, but this effect disappeared after the stop week. In addition to the effects on sleep, results from questionnaires completed by parents showed that melatonin treatment also had positive effects on children's health and behavior problems and parenting stress. While health deteriorated after treatment discontinuation, the effects on behavior problems and parenting stress remained. Behavior problems at baseline did not influence the effect of melatonin treatment.
This study showed that complete termination of treatment after 4 weeks of melatonin use was too early. However, clinicians may advise a lower dose after a successful treatment trial of several weeks.
Sleep Medicine 09/2011; 12(9):875-9. · 3.40 Impact Factor
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ABSTRACT: The objective of this study was to compare three patient-based New York Heart Association assessments with cardiologist assessments in outpatients with congenital cardiac disease.
Consecutive adult outpatients completed three questionnaires in a random order: a patient-based translation of the New York Heart Association classes, a self-constructed questionnaire based on the New York Heart Association classes, and the Specific Activity Scale. The treating cardiologist assessed the New York Heart Association class on the same day. Patient-cardiologist agreement was assessed by calculating percent agreement and weighted kappa. We also explored the level of agreement for patients without co-morbidity.
In all, 86 adults--with a median age of 35.8 years--including 46 women participated. An agreement of 75.6% (weighted kappa is 0.43; probability is smaller than 0.01), 70.6% (weighted kappa is 0.44; probability is smaller than 0.01), and 74.4% (weighted kappa is 0.28; probability is smaller than 0.01) was found between the cardiologist assessment and the patient-based translation, self-constructed questionnaire, and the Specific Activity Scale, respectively. The patient-based translation equally over- and underestimated the New York Heart Association class, whereas the self-constructed questionnaire overestimated and the Specific Activity Scale underestimated the New York Heart Association class. Agreement levels for patients without co-morbidity were higher than agreement levels for the total group.
The patient-based translation yielded adequate agreement with cardiologist-assessed New York Heart Association class, showed equal over- and underestimation, and was easy to complete. The patient-based translation with the instruction to only consider functional impairments caused by the congenital cardiac defect is recommended in future studies of outpatients with congenital cardiac disease.
Cardiology in the Young 07/2011; 22(1):26-33. · 0.76 Impact Factor
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Quality of Life Research 03/2011; · 2.30 Impact Factor
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ABSTRACT: To illustrate how structural equation modeling (SEM) can be used for response shift detection with random measurement occasions and health state operationalized as fixed group membership (Study 1) or with fixed measurement occasions and health state operationalized as time-varying covariates (Study 2).
In Study 1, we explored seven items of the Performance Scales measuring physical and mental aspects of perceived disability of 771 stable, 629 progressive, and 1,552 relapsing MS patients. Time lags between the three measurements varied and were accounted for by introducing time since diagnosis as an exogenous variable. In Study 2, we considered the SF-12 scales measuring physical and mental components of HRQoL of 1,767 patients. Health state was accounted for by exogenous variables relapse (yes/no) and symptoms (worse/same/better).
In Study 1, progressive and relapsing patients reported greater disability than stable patients but little longitudinal change. Some response shift was found with stable and relapsing patients. In Study 2, relapse and symptoms were associated with HRQoL, but no change and only little response shift was found.
While small response shifts were found, they had little impact on the evaluation of true change in performance and HRQoL.
Quality of Life Research 01/2011; 20(10):1527-40. · 2.30 Impact Factor
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ABSTRACT: The diagnostic approach to dizzy, older patients is not straightforward as many organ systems can be involved and evidence for diagnostic strategies is lacking. A first differentiation in diagnostic subtypes or profiles may guide the diagnostic process of dizziness and can serve as a classification system in future research. In the literature this has been done, but based on pathophysiological reasoning only.
To establish a classification of diagnostic profiles of dizziness based on empirical data.
Cross-sectional study.
417 consecutive patients of 65 years and older presenting with dizziness to 45 primary care physicians in the Netherlands from July 2006 to January 2008.
We performed tests, including patient history, and physical and additional examination, previously selected by an international expert panel and based on an earlier systematic review. We used the results of these tests in a principal component analysis for exploration, data-reduction and finally differentiation into diagnostic dizziness profiles.
Demographic data and the results of the tests yielded 221 variables, of which 49 contributed to the classification of dizziness into six diagnostic profiles, that may be named as follows: "frailty", "psychological", "cardiovascular", "presyncope", "non-specific dizziness" and "ENT". These explained 32% of the variance.
Empirically identified components classify dizziness into six profiles. This classification takes into account the heterogeneity and multicausality of dizziness and may serve as starting point for research on diagnostic strategies and can be a first step in an evidence based diagnostic approach of dizzy older patients.
PLoS ONE 01/2011; 6(1):e16481. · 4.09 Impact Factor
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ABSTRACT: Insufficient sleep, poor sleep quality and sleepiness are common problems in children and adolescents being related to learning, memory and school performance. The associations between sleep quality (k=16 studies, N=13,631), sleep duration (k=17 studies, N=15,199), sleepiness (k=17, N=19,530) and school performance were examined in three separate meta-analyses including influential factors (e.g., gender, age, parameter assessment) as moderators. All three sleep variables were significantly but modestly related to school performance. Sleepiness showed the strongest relation to school performance (r=-0.133), followed by sleep quality (r=0.096) and sleep duration (r=0.069). Effect sizes were larger for studies including younger participants which can be explained by dramatic prefrontal cortex changes during (early) adolescence. Concerning the relationship between sleep duration and school performance age effects were even larger in studies that included more boys than in studies that included more girls, demonstrating the importance of differential pubertal development of boys and girls. Longitudinal and experimental studies are recommended in order to gain more insight into the different relationships and to develop programs that can improve school performance by changing individuals' sleep patterns.
Sleep Medicine Reviews 06/2010; 14(3):179-89. · 6.93 Impact Factor
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ABSTRACT: Based on the multiple goal perspective it is argued that mastery and performance goals contribute to different motivational variables-mastery goals to self-efficacy and performance goals to social comparison-that contribute through affect to achievement. The first aim of this study was to determine whether this model is applicable irrespective of sex and subject. The expected relationships occurred for female students studying Dutch and mathematics, and for male students studying Dutch. The second aim was to test a model in which the perceived gender appropriateness of the subject affects the pursued achievement goal. We expected that subjects perceived as gender-appropriate--Dutch for female and mathematics for male students--would result in strong relationships between mastery goals, self-efficacy, affect, and achievement, and that less gender-appropriate subjects--mathematics for women and Dutch for men--would result in strong relationships between performance goals, social comparison, affect, and achievement. Several of the expected relationships occurred for female and males students studying Dutch and mathematics. Furthermore, female students obtained higher course grades in Dutch than male students, while male students studying mathematics scored higher on self-efficacy and affect than female students.
International Journal of Psychology 10/2009; 44(5):351-9. · 0.40 Impact Factor
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ABSTRACT: Response shift is generally associated with a change in the meaning of test scores, impeding the comparison of repeated measurements. Still, different researchers have different views of response shift. From a measurement perspective, response shift can be considered as bias in the measurement of change, whereas from a more conceptual perspective, it can be considered as bias in the explanation of change. We propose definitions to accommodate both interpretations of response shift.
Formal definitions of measurement bias and explanation bias serve to define response shift in measurement and conceptual perspectives. Examples from the field of health-related quality of life research illustrate the definitions.
Definitions of response shifts as special cases of either measurement bias or explanation bias clarify different interpretations of response shift and lead to different research methods. Different structural equation models are suggested to investigate biases and response shifts in each of the two perspectives.
It is important to distinguish between measurement and conceptual perspectives as they involve different ideas about response shift. Definitions from both perspectives help to resolve conceptual and methodological confusion around response shift and to further its research.
Journal of clinical epidemiology 07/2009; 62(11):1126-37. · 2.96 Impact Factor
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ABSTRACT: Although immigrants may be more dependent on their immediate family for support, they may also experience a wider generation-gap in values regarding intergenerational solidarity, because of processes of acculturation. Based on large scale survey data (N = 2,028), differences between first and second generation immigrants in values regarding intergenerational solidarity were examined among family members in the Netherlands with an immigration background from Turkey, Morocco, Suriname, and The Dutch Antilles. Using a multilevel analytic approach, effects of family and individual characteristics on values regarding intergenerational solidarity were tested, considering the perspectives of two generations. It was found that immigrants with Moroccan and Turkish backgrounds scored higher on values with respect to intergenerational family solidarity than immigrants stemming from Suriname and The Antilles. First generation immigrants placed higher values on family solidarity compared to second generation immigrants. Additionally, religious denomination was a significant predictor of higher values with respect to intergenerational family solidarity. Immigration and acculturation may create great strains in migrant families. Policies to support the fabric of intergenerational solidarity should consider ethnic and religious background and immigration history.
Journal of Family Psychology 07/2009; 23(3):291-300. · 1.66 Impact Factor
