Content uploaded by Ludger Niemann
Author content
All content in this area was uploaded by Ludger Niemann on Jan 12, 2021
Content may be subject to copyright.
Mindfulness-based stress reduction and health benefits
A meta-analysis
Paul Grossman
a,
*, Ludger Niemann
b
, Stefan Schmidt
c
, Harald Walach
c,d
a
Freiburg Institute for Mindfulness Research, Konradstr. 32, 79100, Freiburg, Germany
b
Department of Psychology, University of Freiburg, Freiburg, Germany
c
Institute of Environmental Medicine, University Hospital Freiburg, Freiburg, Germany
d
Samueli Institute, European Office, Freiburg, Germany
Received 5 March 2003; accepted 8 July 2003
Abstract
Objective: Mindfulness-based stress reduction (MBSR) is a
structured group program that employs mindfulness meditation to
alleviate suffering associated with physical, psychosomatic and
psychiatric disorders. The program, nonreligious and nonesoteric,
is based upon a systematic procedure to develop enhanced
awareness of moment-to-moment experience of perceptible mental
processes. The approach assumes that greater awareness will
provide more veridical perception, reduce negative affect and
improve vitality and coping. In the last two decades, a number
of research reports appeared that seem to support many of these
claims. We performed a comprehensive review and meta-analysis
of published and unpublished studies of health-related studies
related to MBSR. Methods: Sixty-four empirical studies were
found, but only 20 reports met criteria of acceptable quality or
relevance to be included in the meta-analysis. Reports were
excluded due to (1) insufficient information about interventions,
(2) poor quantitative health evaluation, (3) inadequate statistical
analysis, (4) mindfulness not being the central component of
intervention, or (5) the setting of intervention or sample
composition deviating too widely from the health-related MBSR
program. Acceptable studies covered a wide spectrum of clinical
populations (e.g., pain, cancer, heart disease, depression, and
anxiety), as well as stressed nonclinical groups. Both controlled and
observational investigations were included. Standardized measures
of physical and mental well-being constituted the dependent
variables of the analysis. Results: Overall, both controlled and
uncontrolled studies showed similar effect sizes of approximately
0.5 ( P< .0001) with homogeneity of distribution. Conclusion:
Although derived from a relatively small number of studies, these
results suggest that MBSR may help a broad range of individuals to
cope with their clinical and nonclinical problems.
D2004 Elsevier Inc. All rights reserved.
Keywords: Chronic disease; Coping; Meta-analysis; Mindfulness; Psychosomatic disorders; Stress
Introduction
Coping with the symptoms, disability, and uncertain
perspectives of chronic disease is a harrowing challenge
for a significant proportion of the population. However,
addressing the biopsychosocial adjustment of chronically
ill individuals is an area that continues to tax the resources
and limits of modern conventional medicine and one for
which few professionals have adequate time or training.
Programs that do exist to improve the well-being and health
status of the chronically ill are often still in their infancy and
typically directed toward a specific illness and limited
range of symptoms. A single, relatively brief and cost-
effective program that can potentially be applied to a range
of chronic illnesses and is able to effect a positive shift in
fundamental perspectives toward health and disease should
be of great interest.
During the last two decades, a group-intervention program
known as mindfulness-based stress reduction (MBSR) has
been proposed as just such an approach [1]. This procedure
has been employed among patients with a wide variety of
chronic clinical ailments, as well among groups of relatively
healthy individuals who have hoped to improve their abilities
to cope with the normal but often significant stresses of daily
life. Preliminary reports have suggested substantial benefits
for individuals suffering from chronic pain, fibromyalgia,
0022-3999/04/$ – see front matter D2004 Elsevier Inc. All rights reserved.
doi:10.1016/S0022-3999(03)00573-7
* Corresponding author.
E-mail address: breathingspace@t-online.de (P. Grossman).
Journal of Psychosomatic Research 57 (2004) 35 – 43
cancer, anxiety disorders, depression and the stresses of
contexts as diverse as medical school and prison life (e.g.,
Refs. [2– 4]). However, many of the published studies re-
main critically unevaluated and may be of questionable
scientific rigor or too limited in scope to confirm such
claims. A recently published paper provided a valuable
critique of mindfulness studies, but without providing a
quantitative assessment of existing studies [5].
In this report, we provide a meta-analytic review of
all accessible published and unpublished investigations pur-
porting health-related benefits of MBSR. Our aim is to
provide an empirical basis for evaluating whether or not
evidence exists that MBSR systematically improves health-
related dimensions among the chronically ill and others, what
and how large the specific benefits may be, and whether
more extensive evaluation of MBSR may be warranted.
MBSR is a group program that focuses upon the
progressive acquisition of mindful awareness, or mindful-
ness. The construct of mindful awareness originated in
earliest Buddhist documents but is neither religious nor
esoteric in nature [6]. Several Buddhist treatises detail an
elaborate psychological theory of mind, in which mindful-
ness consistently plays a central role [7]. Mindfulness is
characterized by dispassionate, nonevaluative and sustained
moment-to-moment awareness of perceptible mental states
and processes. This includes continuous, immediate aware-
ness of physical sensations, perceptions, affective states,
thoughts, and imagery. Mindfulness is nondeliberative: It
merely implies sustained paying attention to ongoing men-
tal content without thinking about, comparing or in other
ways evaluating the ongoing mental phenomena that arise
during periods of practice. Thus, mindfulness may be seen
as a form of naturalistic observation, or participant-obser-
vation, in which the objects of observation are the percep-
tible mental phenomena that normally arise during waking
consciousness. Underlying this concept and approach are
the following assumptions: (1) Humans are ordinarily
largely unaware of their moment-to-moment experience,
often operating in an ‘‘automatic pilot’’ mode; (2) we are
capable of developing the ability to sustain attention to
mental content; (3) development of this ability is gradual,
progressive and requires regular practice; (4) moment-to-
moment awareness of experience will provide a richer and
more vital sense of life, inasmuch as experience becomes
more vivid and active mindful participation replaces un-
conscious reactiveness; (5) such persistent, nonevaluative
observation of mental content will gradually give rise to
greater veridicality of perceptions; and (6) because more
accurate perception of one’s own mental responses to
external and internal stimuli is achieved, additional infor-
mation is gathered that will enhance effective action in
the world, and lead to a greater sense of control (e.g., Refs.
[1,6,7]).
Health-related benefits derived from such claims should
include enhanced emotional processing and coping regard-
ing the effects of chronic illness and stress, improved self-
efficacy and control, and a more differentiated picture of
wellness in which stress and ailments play natural roles
but still allow enjoyment of life as full and rich (i.e.,
improved quality of life including general competencies,
and affective and social dimensions). Evidence from the
following meta-analysis may bear upon confirming or
refuting such claims.
MBSR is a structured 8 – 10 week, group program with
groups usually varying between 10 and 40 participants.
Groups may be either heterogeneous or homogeneous with
respect to disorders or problem areas of participants.
Single weekly sessions are typically 2.5 h, and there is
an additional single all-day session per course on a
weekend day. Each session covers particular exercises
and topics that are examined within the context of mind-
fulness. These include different forms of mindfulness
meditation practice, mindful awareness during yoga pos-
tures, and mindfulness during stressful situations and
social interactions. Because development of mindfulness
is predicated upon regular and repeated practice, partic-
ipants enter upon enrolling into a commitment to carry out
daily 45-min homework assignments primarily in the form
of meditation practice, mindful yoga and applying mind-
fulness to situations in everyday life.
For the purpose of the current review, we examined
64 empirical reports that either used the structured
MBSR program or applied mindfulness procedures as the
central component of a group procedure to improve health-
related measures.
Methods
Methods of the analysis and inclusion criteria were
specified in advance and documented in a protocol.
Inclusion criteria
Criteria for the inclusion of studies included the following:
1. Studies were published before 12/2002 or, in the case of
unpublished material, relevant information obtained
before 12/2001.
2. Published, as well as unpublished, investigations were
included. A minimum requirement for inclusion was the
availability of an abstract in the English language.
3. Programs emphasized a mindfulness-based interven-
tion, with mindfulness operationalized as the following:
3.1. Moment to moment awareness to be cultivated with
a nonjudgmental attitude.
3.2. Teaching of formal meditation techniques.
3.3. Stressing the importance of daily and systematic
practice.
4. Interventions were group taught, i.e., no individual
training.
P. Grossman et al. / Journal of Psychosomatic Research 57 (2004) 35–4336
5. Courses were based on a length of 6 – 12 weeks with
approximately 2.5 h per week; intensive meditation
retreats were not included.
6. Quantitative outcome measures were available.
7. Outcome measures could be subsumed under dimen-
sions of physical or mental health.
8. Outcome measures were derived from standardized and
validated scales.
9. Available data of each study allowed for the calculation
of effect sizes.
10. Controlled studies were required to have a control group
procedure that was either inactive (wait-list) or active in
the sense that they were oriented to controlling for
nonspecific effects of the mindfulness group (e.g., social
support, demand characteristics and expectancy effects).
11. Postintervention, and not necessarily follow-up, data
were provided and assessed.
Literature research
Several search strategies were applied:
1. An electronic search was conducted in the following
databases: Medline,PsychInfo including Digital Disser-
tations,Psyndex Plus,Web of Science including Science
Citation Index and the Cochrane Library. Databases were
searched for the occurrence of the keywords mindfulness,
Vipassana,insight meditation,stress reduction and mind/
body anywhere in the record.
2. We inspected the reference sections of all retrieved
studies, as well as in a set of theoretical publications on
mindfulness meditation.
3. We contacted the first authors of all identified studies
assessing the effect of a mindfulness meditation inter-
vention and asked them for unpublished material, ongoing
research and whether they knew of any other researchers
having unpublished data or ongoing studies.
Study coding
All studies meeting the above inclusion criteria were
coded by the second author (LN). Studies were coded for
their design (controlled study, observational study, follow-
up data), group allocation (randomization, quasiexperimen-
tal), type of control (waiting list, no treatment, treatment as
usual, active control), study population (patients, nonpa-
tients, students, inmates, etc.), patients’ diagnoses,and
outcome measures. All coding was later verified by the
first author (PG).
Data selection and extraction
The aim of our meta-analysis was to assess the effect of
a mindfulness meditation intervention on health status
measures. We considered the concept of health to include
both physical and mental health. All outcome measures
were either subsumed under ‘‘physical health’’, ‘‘mental
health’’ or were excluded from the analysis. We only
included data from standardized and validated scales with
established internal consistency (e.g., the Global Severity
Inventory of Symptom Check List—R, Hospital Anxiety
and Depression Scale, Beck Depression Inventory, Profile
of Mood States, McGill-Melzack Pain-Rating Scale, Short
Form 36 Health Survey, and Medical Symptom Checklist;
a full list is available upon request). Also a conservative
procedure was chosen to exclude relatively ambiguous or
unconventional measures, e.g., spiritual experience, empa-
thy, neuropsychological performance, quality of social
support, and egocentrism.
‘‘Mental health’’ constructs comprised scales such as
psychological wellbeing and symptomatology, depression,
anxiety, sleep, psychological components of quality of
life, or affective perception of pain. ‘‘Physical health’’
constructs were medical symptoms, physical pain, physi-
cal impairment, and physical component of quality of
life questionnaires.
All decisions on the inclusion and allocation of outcome
measures were based on consensus discussions among LN,
PG and HW (last author). Relevant data for every measure
included into the analysis were extracted and entered into an
Excel spreadsheet.
We examined immediate, pre to postintervention change
to assess effects of mindfulness training—and not longer
term effects—due to lack of follow-up data in several studies
and because follow-up periods varied so greatly in elapsed
postintervention duration. Our results, therefore, merely
indicate the presence or absence of short-term responses
and do not directly address any long-term effects.
Effect size calculation
We calculated Cohen’s deffect sizes by dividing the
mean difference by their pooled standard deviation. Two
types of mean differences were employed: (i) treatment-
control difference (between-group), and (ii) posttreatment –
pretreatment difference (within-group). We included the
latter, within-group analyses because there were a relatively
small number of controlled studies that met criteria, and
several rather carefully conducted uncontrolled observation-
al studies that did adhere to criteria. Additionally, we
believed that it might be informative to compare effect sizes
between observation studies, and both randomized and
quasiexperimental controlled investigation.
In the case of (i), posttreatment values are usually entered
into the equation assuming no baseline difference between
groups before the intervention. As this assumption could not
always be maintained for our data set, we calculated two
effect sizes, one based on the pretreatment values (baseline
difference) and one on the posttreatment values. The final
effect size entering the meta-analysis was obtained by
subtracting the baseline difference from the effect size for
the postintervention values.
P. Grossman et al. / Journal of Psychosomatic Research 57 (2004) 35–43 37
For the calculation of the (ii) pre – post effect sizes, the
correlation between pre- and postintervention measures is
needed. As this correlation could not be obtained from the
study reports, we entered a global estimation of r= .7 into
the formula [8]. All effect sizes were corrected for small
sample bias by a simple formula provided by Hedges [9].
Data aggregation
We first integrated all effect sizes within a single study by
the calculation of means into two effect sizes, one for mental
and one for physical health. If the sample size varied
between scales of one study, we weighted them for N.
Effect sizes obtained in this manner were aggregated across
studies by the computation of a weighted mean, where the
inverse of the estimated standard deviation for each inves-
tigation served as a weight [8]. Confidence intervals (CI)
were based on the overall mean effect size’s standard error
calculated by the formula
SEd¼ffiffiffiffiffiffiffiffiffiffiffi
1
Pwi
sð1Þ
with w
i
being the single study’s weight [8]. Two-tailed P
values were calculated by the computation of a zscore with
z=d/SE
d
. Homogeneity of treatment effects across studies
were tested by computing a formula that provides a Qvalue,
which is v
2
distributed with df =k1, with kstanding for the
number of studies entering the test [9].
Overall and sensitivity analyses
We calculated two separate meta-analyses. The first
included all controlled studies with the effect size based
on the comparison between the experimental and the control
groups. The second analysis used data from both controlled
studies (employing only results from the mindfulness inter-
vention) and observational studies (i.e., in which no control
group existed). Regarding the latter set of analyses, we
aggregated all effect sizes based on a pre – post difference
for groups undergoing mindfulness training. For both anal-
yses, we calculated separate mean effect sizes for mental
and physical health. Sensitivity analyses were calculated for
several subgroups by splitting the data set and by calculation
of separate analyses for each subgroup.
Results
We retrieved 64 studies but only 20 reports, comprising a
total of 1605 subjects, met the inclusion criteria (noted in
References with an asterisk and in Further Readings; note
that some studies were presented in more than one publica-
tion). A list of all retrieved studies are included in Appendix
A. Most of the excluded studies did not operationalize
mindfulness training in the specified manner or reported
insufficient statistical details for effect size calculation.
Studies investigating mindfulness training among medi-
cal patients included the following diagnoses: Fibromyalgia,
mixed cancer diagnoses, coronary artery diseases, depres-
sion, chronic pain, anxiety, obesity and binge eating disor-
Table 1
Overview of controlled studies included in the meta-analysis
Study Year
Pub.
status Sample Diagnosis Design Control group NN
t
N
c
MH PH d
MH
d
PH
Bruckstein [21] 1999 d pat. Chronic pain QE attention placebo 22 15 7 4 2 0.53 0.75
Murphy [25] 1995 d pris. – RCT Jacobson relaxation 31 15 16 3 – 0.30 –
Perkins [24] 1998 d pris. – RCT WL 97 49 48 4 – 0.49 –
Rosenzweig et al. [26] 2003 u stud. – QE seminar 277 125 152 2 – 0.54 –
Sephton et al. [18] 2001 ab pat. Fibromyalgia RCT WL 55 – 65 22– 27 33 – 39 4 2 0.67 0.25
Shapiro et al. [4] 1998 p stud. – RCT WL 73 36 37 4 – 0.62 –
Speca et al. [2] 2000 p pat. Cancer RCT WL 90 53 37 2 – 0.54 –
Tiefenthaler-Gilmer [23];
and Tiefenthaler and
Grossman [22] (1 study)
2002,
2002
u,
ab
pat. Fibromyalgia QE social supp.,
relaxation and
exercise group
38 25 13 4 1 0.52 0.30
Williams, Larkin et al. [19] 2001 u pat. Coronary
artery dis.
RCT stress management
training
21 11 10 8 1 0.46 0.29
Williams, Kolar et al. [20] 2001 p vol. – RCT educational material
given
47 – 57 28– 32 19 – 26 2 1 0.56 1.01
Overall 771 388 385 37 7
Pub. status, publication status (d, dissertation; u, unpublished; ab, abstract, p, published), sample (pat., patients; pris., prisoners; stud.; students; vol.,
volunteers), design (RCT, randomized controlled trial, QE, quasiexperimental design), control group (WL, waiting list control), N, total number of subjects in
this study, N
t
, number of subjects in the treatment group, N
c
, number of subjects in the control group, MH, number of mental health scales employed in the
study, PH, number of physical health scales employed, d
MH
mean effect size for all mental health scales, d
PH
mean effect size for all physical health scales.
All numbers refer only to study completers.
Ranges within N,N
t
and N
c
refer to different scales.
P. Grossman et al. / Journal of Psychosomatic Research 57 (2004) 35–4338
der, and psychiatric patients. Two reports were based on
prison populations, and three included nonclinical samples
who sought to improve coping with stress.
Controlled studies
Thirteen of the qualified investigations included control
groups. However, we excluded another three studies from
the data set for the following reasons. One study compared
mindfulness meditation to a well-established psychoeduca-
tional program of proven efficacy [10]. This did not fulfill
our criteria of an active ‘‘control’’ procedure but represented
a comparison study; findings of this study were, however,
included in the section below, ‘‘Observational Studies’’.
Two other investigations provided only follow-up data,
but did not report posttreatment scores in a proper time-
frame for our investigation and were also excluded (Refs.
[3,11,12]; the latter two represent different findings from the
same study). Of the remaining 10 studies, seven were
properly randomized and three had a quasiexperimental
design. Five studies had patients as subjects, and a variety
of control procedures were applied (see Table 1).
Table 2 provides results (mean effect size, 95%-CI, P
value) for the mental health variables of all controlled
studies. Data of a total of 771 individuals are shown, with
388 of them receiving a mindfulness training. The table also
shows the results for the subsamples obtained by splitting
the data set for the factors subject population (patients vs.
nonpatients) and group allocation (randomization vs. qua-
siexperimental control). Only five of the controlled studies
applied physical health variables as outcome measures.
For the mental health variables the data set proved to be
homogeneous (v
2
= 0.89, df =9, P= .999). It yielded a sig-
nificant medium strength effect size [13] of d= 0.54 (95%-
CI 0.39– 0.68, P< .0001, two-tailed). Sensitivity analys es of
the subgroups showed no significant differences for the
variables subject population or group allocation.
Only five of the controlled studies reported data that
could be subsumed under physical health. Results for 203
individuals are included, 122 of whom received mindfulness
instruction. This reduced data set also proved to be homo-
geneous (v
2
= 4.97, df =4,P= .29). The summary resul ts are
also presented in Table 2. The mean effect size of d= 0.53
(95%-CI 0.23 – 0.81, P= .0004) is similar to that of the
mental health variables.
Observational studies
Table 3 shows the results for pre- to postintervention
comparisons for both sets of outcome measures ( physical
and mental health). Overall data from 18 investigations and
894 individuals receiving mindfulness training entered the
data set. Only nine studies with 566 individuals assessed
variables of physical health. The mean effect sizes, d= 0.50
(95%-CI 0.43– 0.56, P< .0001) for mental health, and
d= 0.42 (95%-CI 0.34 – 0.50, P< .0001) for physical health
are relatively similar to the results of the controlled studies.
Both effect sizes are also significant but only the set with
physical health parameters proved to be homogeneous
(v
2
= 11.45, df =8, P= .18); the other set did not pass the
test of homogeneity (mental health v
2
= 51.92, df =17,
P< .0001).
Employing a sensitivity analysis, we, therefore, assessed
whether the variable subject population moderated the
effect. Results indicated that each subgroup (patients and
others) showed significant heterogeneity (patients,
v
2
= 33.29, df = 12, P< .001; nonpatients , v
2
= 15.84, df =4,
P= .003). Thus, this mean effect size should be interpreted
with caution.
Discussion
Our findings suggest the usefulness of MBSR as an
intervention for a broad range of chronic disorders and
problems. In fact, the consistent and relatively strong level
of effect sizes across very different types of sample indi-
cates that mindfulness training might enhance general
features of coping with distress and disability in everyday
life, as well as under more extraordinary conditions of
serious disorder or stress. Another recently published study
employing different inclusion criteria and a somewhat
Table 3
Effect of mindfulness training based on a pre– post comparison for mental
and physical health variables (k, number of studies; N, number of subjects;
d, mean effect size; Pvalue, two-tailed)
Variables kN d 95%-CI P
Mental health 18 894 0.50 0.43– 0.56 P< .0001
Physical health 9 566 0.42 0.34 – 0.50 P< .0001
Table 2
Mean effect size, d, 95% confidence intervals (CIs) and Pvalues (two-
tailed) calculated for the difference between mindfulness meditation and
control group on mental health and physical health variables for all
controlled studies
kN d 95%-CI P
Mental health variables
All studies 10 771 0.54 0.39 – 0.68 <.0001
Patients 5 236 0.56 0.29 – 0.83 <.0001
Nonpatients 5 535 0.53 0.36– 0.70 <.0001
Randomized 7 434 0.54 0.35 – 0.74 <.0001
Quasiexperimental 3 337 0.54 0.32 – 0.76 <.0001
Physical health variables
All studies (4 patients and
3 randomized)
5 203 0.53 0.23 – 0.81 <.0004
Subgroups of studies with patients, nonpatients, randomized design and
quasi-experimental-design are noted only for mental health measures. The
very limited number of studies with physical health variables precluded the
usefulness of calculating separate CIs.
P. Grossman et al. / Journal of Psychosomatic Research 57 (2004) 35–43 39
divergent strategy also provides additional support for the
effectiveness of mindfulness interventions [28].Inboth
investigations, improvements were consistently seen across
a spectrum of standardized mental health measures includ-
ing psychological dimensions of quality of life scales,
depression, anxiety, coping style and other affective dimen-
sions of disability. Likewise, similar benefits were also
found for health parameters of physical well-being, such
as medical symptoms, sensory pain, physical impairment,
and functional quality-of-life estimates, although measures
of physically oriented measures were less frequently
assessed in the studies as a whole.
Results of other carefully performed trials that did not
conform to our criteria of timeframe, dependent measures,
or control procedures also point to the efficacy of mindful-
ness training [3,10]. For example, a recent randomized study
of depressives in remission found one-year relapse rates of
major depressive episodes to be halved when conventional
treatment was supplemented by a mindfulness program [3].
Another investigation of mindfulness training among anxi-
ety and mood disorder patients showed pre- to postinter-
vention improvements in mental health outcomes with an
effect size of 0.7 [10].
In our meta-analysis, the similarity of effect sizes across
types of study (e.g., controlled vs. observational) and within
the controlled-study analysis (active control vs. wait list)
does provide some support for the specificity of the mind-
fulness intervention. Particularly relevant here are those six
controlled investigations (see Table 1) that employed forms
of active control intervention to account for general or
nonspecific effects of treatment. These studies show a mean
effect size of almost 0.49, not far removed and not signif-
icantly different from the mean effect size observed in the
four wait-list groups (d=0.58) that lacked control of most
nonspecific effects of intervention. Nevertheless, such infer-
ences must be weighed very cautiously due to the modest
number of total, and particularly of randomized, studies, the
diversity of types of sample diagnoses, and the inclusion of
unpublished investigations.
Several other caveats must be also addressed regarding
these mindfulness studies and our analyses: Due to the
limited number of investigations with comparable follow-
up data or with follow-up data at all, the meta-analysis was
restricted to the more or less immediate effects postinter-
vention. Whereas several investigations do point to long-
term benefits of mindfulness training [3,14 – 17],much
additional research is required to confirm such benefits.
Secondly, most studies reviewed suffered from methodo-
logical deficiencies beyond merely the type of design as
randomized, quasiexperimental or observational. Insuffi-
cient consideration or information was typically given
about participant dropout rate, other concurrent interven-
tions during the mindfulness training period, therapist
adherence to intervention program, evaluation of therapist
training and competence, description of interventions,
adequate statistical power to calculate intervention effects,
or the clinical relevance of results. Additionally, the con-
struct of mindfulness itself, although central to all inter-
ventions, was neither operationalized nor evaluated for
change in any study. Inasmuch as it is assumed that the
primary effects are achieved by acquisition of mindful
awareness, characterization of alterations in mindfulness
would seem to be essential, and there have been recent
attempts to operationalize the concept of mindfulness
[6,27].
Only large-scale and sound research in the future will
be able to bridge this schism between methodological
deficiencies, on the one hand, and the potential promises
of mindfulness training, on the other, as consistently
revealed by a number of positive studies (varying widely
in scientific rigor). Thus far, the literature seems to
clearly slant toward support for basic hypotheses con-
cerning the effects of mindfulness on mental and physical
well-being. Mindfulness training may be an intervention
with potential for helping many to learn to deal with
chronic disease and stress. Nevertheless, we now need to
test these claims more thoroughly by using well-defined
patient populations, applying more stringent methodolog-
ical procedures, and assessing objective disease markers
in addition to self-reported psychosocial and functional
indicators of distress.
Acknowledgments
This investigation was supported by grants to the first
author from the YeTaDeL Foundation, (Cortaro, AZ, USA),
and the Research and Training Institute of the Hebrew
Rehabilitation Center for the Aged (Boston, MA, USA), and
grants to the last two authors from the Samueli Institute
(Corona del Mar, CA, USA). We would also like to thank the
authors of the studies cited in this article for their help in
responding to our inquiries and providing us with unpub-
lished data. Finally we also wish to express appreciation
to the two anonymous reviewers for their careful and
constructive comments.
Appendix A . All retrieved studies related to mindfulness
1. Amawattana T, Mandel J, Ekstrand M. A pilot study of
AIDS education combined with Vipassana meditation
among Thai university students. International Confer-
ence on AIDS. 10:344 (abstract no. PD0555), 1994.
2. Arcari PM. Efficacy of a workplace smoking cessation
program: Mindfulness meditation vs. cognitive – behav-
ioral interventions. Dissertation, Boston College, USA,
1997.
3. Astin JA. Stress reduction through mindfulness medi-
tation: Effects on psychological symptomatology, sense
of control, and spiritual experiences. Psychother Psy-
chosom 1997;66:97– 106.
P. Grossman et al. / Journal of Psychosomatic Research 57 (2004) 35–4340
4. Baime MJ, Baime RV. Stress management using mind-
fulness meditation in a primary care general internal
medicine practice. J Gen Intern Med 1996; 11:131.
5. Berman BM, Singh BB. Chronic low back pain: an
outcome analysis of a mind– body intervention. Com-
plement Ther Med 1997;5:29 – 35.
6. Brown JR. Psychospiritual openings of meditating pain
patients: a phenomenological study. Dissertation, Pacif-
ica Graduate Institute, USA, 1999.
7. Bruckstein DC. Effects of acceptance-based and cogni-
tive behavioral interventions on chronic pain manage-
ment. Dissertation, Hofstra University, USA, 1999.
8. Carlson LE, Ursuliak Z, Goodey E, Angen M, Speca M.
The effects of a mindfulness meditation-based stress
reduction program on mood and symptoms of stress in
cancer outpatients: 6-months follow-up. Support Care
Cancer 2001;9:112– 23.
9. Chandiramani K, Jena R, Verma SK. Human figure
drawings of prisoners and Vipassana. J Proj Psychol
Mental Health 1995;2:153– 8.
10. Deatherage G. The clinical use of ‘‘mindfulness’’
meditation techniques in short-term psychotherapy. J
Transpers Psychol 1975;7.
11. DeBerry S, Davis S, Reinhard KE. A comparison of
meditation – relaxation and cognitive/behavioral tech-
niques for reducing anxiety and depression in a
geriatric population. J Geriatr Psychiatry 1989;22:
231– 47.
12. Deepak KK, Manchanda SK, Maheshwari MC. Medi-
tation improves clinicoelectroencephalographic meas-
ures in drug-resistant epileptics. Biofeedback Self-Regul
1994;19:25– 40.
13. Disayavanish P. The effect of Buddhist insight medi-
tation on stress and anxiety. Dissertation, Illinois State
University, 1995.
14. Dixit SP, Agrawal A, Dubey GP: Management of
essential hypertension by using biofeedback technique.
Pharmacopsychoecologia 1994;7:17 – 9.
15. Dua JK, Swinden ML. Effectiveness of negative-
thought-reduction, meditation, and placebo training
treatment in reducing anger. Scand J Psychol 1992; 33.
16. Emavardhana T, Tori CD. Changes in self-concept, ego
defense mechanisms, and religiosity following seven-
day Vipassana meditation retreats. J Sci Study Relig
1997;36:194– 206.
17. Flinton CA. The effects of meditation techniques on
anxiety and locus of control in juvenile delinquents.
Dissertation, California Institute of Integral Studies,
USA, 1998.
18. Garrison J, Scott PA. A group self-care approach to
stress management. J Psychiatr Nursing 1979;17: 9 –14.
19. Giommi F, Barendregt H, Oliemeulen L, van Hoof J,
Tinge J, Coenen A, van Dongen M. Mindfulness-based
attention training as an effective component in treating
emotional disorders: A comparison study. Unpublished
findings, the Netherlands, 2001.
20. Goldberg D, Hoffman A, Furomoto-Dawson A, Nelson-
Johnson H. Mindfulness-based stress reduction and its
effects on well-being. J Investig Med 1998;46:278A.
21. Goldenberg DL, Kaplan KH, Nadeau MG, Brodeur C,
Smith S, Schmid CH. A controlled study of a stress
reduction, cognitive – behavioral treatment program in
fibromyalgia. J Musculoskelet Pain 1994;2:53 – 66.
22. Greene YN, Hiebert B: A comparison of mindfulness
meditation and cognitive self-observation. Can J Couns
1988;22:25– 34.
23. Hebert JR, Kabat-Zinn J, Clemow L, Massion AO.
Effects of meditation-based stress reduction in women
with breast cancer. Unpublished findings, USA, 2001.
24. Hebert JR, Ebbeling CB, Olendzki BC, Hurley TG,
Ma Y, Saal N, Ockene JK, Clemow L. Change in
women’s diet and body mass following intensive
intervention for early-stage breast cancer. J Am Diet
Assoc 2001;101:421– 31.
25. Hellman CJ, Budd M, Borysenko JZ. A study of the
effectiveness of two group behavioral medicine inter-
ventions for patients with psychosomatic complaints.
Behav Med 1990;16:165 – 73.
26. Hoffman A, Goldberg D, Bockian N, Broadwell S,
Palmieri MJ. Training medical residents in mindfulness-
based stress reduction: a quantitative and qualitative
evaluation. J Investig Med 1998;46:267A.
27. Kabat-Zinn J. An outpatient program in behavioral
medicine for chronic pain patients based on the
practice of mindfulness meditation: theoretical consid-
erations and preliminary results. Gen Hosp Psychiatry
1982;4:33– 47.
28. Kabat-Zinn J, Lipworth L, Burney R. The clinical use of
mindfulness meditation for the self-regulation of
chronic pain. J Behav Med 1985;8:163 – 90.
29. Kabat-Zinn J, Lipworth L, Burney R, Sellers W. Four-
year follow-up of a meditation program for the self-
regulation of chronic pain: treatment outcome and
compliance. J Clin Pain 1987;2:159 – 73.
30. Kabat-Zinn J, Massion AO, Kristeller J, Peterson LG,
Fletcher KE, Pbert L, Lenderking WR, Santorelli SF.
Effectiveness of a meditation-based stress reduction
program in the treatment of anxiety disorders. Am J
Psychiatry 1992;149:936 – 43.
31. Kabat-Zinn J, Wheeler E, Light T, Skillings A, Scharf
MJ, Cropley TG, Hosmer D, Bernhard JD. Influence of
a mindfulness meditation-based stress reduction inter-
vention on rates of skin clearing in patients with
moderate to severe psoriasis undergoing phototherapy
(UVB) and photochemotherapy (PUVA). Psychosom
Med 1998;60:625– 32.
32. Kaplan KH, Goldenberg DL, Galvin-Nadeau M.
The impact of a meditation-based stress reduction
program on fibromyalgia. Gen Hosp Psychiatry 1993;
15:284– 9.
33. Kelly PJ. Evaluation of a meditation and hypnosis-
based stress management program for men with HIV.
P. Grossman et al. / Journal of Psychosomatic Research 57 (2004) 35–43 41
International Conference on AIDS 5:745 (abstract no.
W.D.P.17), 1989.
34. Kristeller JL, Hallett CB. An exploratory study of a
meditation-based intervention for binge eating disorder.
J Health Psychol 1999;4:357 – 63.
35. Kutz I, Leserman J, Dorrington C, Morrison CH,
Borysenko JZ, Benson H. Meditation as an adjunct to
psychotherapy: an outcome study. Psychother Psycho-
som 1985;43:209– 18.
36. Majumdar M, Grossman P, Dietz-Waschkowski B,
Kersig S, Walach H. Does mindfulness meditation
contribute to health? Outcome evaluation of a Ger-
man sample. J Altern Complement Med 2001;8:
719– 30.
37. Mason O, Hargreaves I. A qualitative study of mind-
fulness-based cognitive therapy for depression. Br J
Med Psychol 2001;74:197 – 212.
38. Miller JJ, Fletcher KE, Kabat-Zinn J. Three-year
follow-up and clinical implications of a mindfulness
meditation-based stress reduction intervention in the
treatment of anxiety disorders. Gen Hosp Psychiatry
1995;17:192– 200.
39. Mills N, Allen J. Mindfulness of movement as a coping
strategy in multiple sclerosis. A pilot study. Gen Hosp
Psychiatry 2000;22:425 – 31.
40. Murphy R. The effects of mindfulness meditation vs.
progressive relaxation training on stress egocentrism
anger and impulsiveness among inmates. Dissertation,
Hofstra University, USA, 1995.
41. Perkins R. The efficacy of mindfulness-based techni-
ques in the reduction of stress in a sample of incar-
cerated women. Dissertation, Florida State University,
USA, 1998.
42. Punyaniyama N. Temporal awareness and hassles
appraisal: a comparison of working adults who practice
Full Awareness of Breathing Meditation with those who
practice Waking Dream Imagery. Dissertation, New
York University, USA, 1997.
43. Randolph PD, Caldera YM, Tacone AM, Greak BL.
The long-term combined effects of medical treatment
and a mindfulness-based behavioral program for the
multidisciplinary management of chronic pain in West
Texas. Pain Digest 1999;9:103– 12.
44. Reibel DK, Greeson JM, Brainard GC, Rosenzweig S.
Mindfulness-based stress reduction and health-related
quality of life in a heterogeneous patient population.
Gen Hosp Psychiatry 2001;23:183 – 92.
45. Rosenzweig S, Reibel DK, Greeson JM, Hojat M,
Brainard GC. Mindfulness-based stress reduction re-
duces psychological distress in medical students. Teach
Learn Med 2003;15:88 – 92.
46. Roth B, Creaser T. Mindfulness meditation-based stress
reduction: experience with a bilingual inner-city pro-
gram. Nurse Pract 1997;22:150 – 2.
47. Roth B. Mindfulness-based stress reduction in the inner
city. Advances 1997;13:50– 8.
48. Sephton SE, Salmon P, Weissbecker I, Studts J. Effects
of a meditation program on symptoms of illness in women
with fibromyalgia. Unpublished findings, USA, 2001.
49. Sephton SE, Lynch G, Weissbecker I, Ho I, Salmon P.
Effects of a meditation program on symptoms of illness
and neuroendocrine responses in women with fibro-
myalgia. Psychosom Med 2001;63:91 – 2.
50. Shapiro SL, Schwartz GE, Bonner G. Effects of
mindfulness-based stress reduction on medical and
premedical students. J Behav Med 1998; 21:581 – 99.
51. Shapiro SL. Randomized clinical trial of a mindfulness-
based intervention in women with breast cancer. Dis-
sertation, University of Arizona, 2001.
52. Sharma MP, Kumaraiah V, Mishra H, Balodhi JP.
Therapeutic effects of Vipassana Meditation in tension
headache. J Pers Clin Stud 1990;6:201 – 6.
53. Shealy CN, Cady RK, Cox RH. Pain, stress and
depression: psychoneurophysiology and therapy. Stress
Med 1995;11:75– 7.
54. Singh BB, Berman BM, Hadhazy VA, Creamer P. A
pilot study of cognitive behavioral therapy in fibro-
myalgia. Altern Ther Health Med 1998;4:67 –70.
55. Speca M, Carlson LE, Goodey E, Angen M. A
randomized, wait-list controlled clinical trial: the effect
of a mindfulness meditation-based stress reduction
program on mood and symptoms of stress in cancer
outpatients. Psychosom Med 2000;62:613 – 22.
56. Tate DB. Mindfulness meditation group training: effects
on medical and psychological symptoms and positive
psychological characteristics. Dissertation, Brigham
Young University, USA, 1994.
57. Teasdale JD, Segal ZV, Williams JMG, Ridgeway VA,
Soulsby JM, Lau MA. Prevention of relapse/recurrence
in major depression by mindfulness-based cognitive
therapy. J Consult Clin Psychol 2000; 68: 615– 23.
58. Teasdale JD, Moore RG, Hayhurst H, Pope M, Williams
S, Segal ZV. Meta-cognitive awareness and prevention
of relapse in depression: empirical evidence. J Consult
Clin Psychol 2001;70:275– 87.
59. Tiefenthaler U, Grossman P. Buddhist psychology’s
potential contribution to psychosomatic medicine:
Evidence from a mindfulness program for fibromyalgia.
Psychosom Med 2002;64:141.
60. Tiefenthaler-Gilmer U. Mindfulness meditation as
clinical intervention: A controlled study of a mindful-
ness-meditation program for fibromyalgia patients
[German]. University of Vienna, Austria, 2002.
61. Williams JMG, Teasdale JD, Segal ZV, Soulsby J.
Mindfulness-based cognitive therapy reduces overgen-
eral autobiographical memory in formerly depressed
patients. J Abnorm Psychol 2000;109:150 – 5.
62. Williams KA, Larkin K, Halperin A, Kolar MM.
Mindfulness-based stress reduction for coronary artery
disease. Unpublished findings, 2001.
63. Williams KA, Kolar MM, Reger BE, Pearson JC.
Evaluation of a wellness-based mindfulness stress
P. Grossman et al. / Journal of Psychosomatic Research 57 (2004) 35–4342
reduction intervention: a controlled trial. Am J Health
Promot 2001;15:422 – 32.
64. Young RP. The experiences of cancer patients practicing
mindfulness meditation. Dissertation, Saybrook Insti-
tute, USA, 2000.
References
[1] Kabat-Zinn J. Full catastrophe living: using the wisdom of your
body and mind to face stress, pain and illness. New York: Delacorte,
1990.
[2*] Speca M, Carlson LE, Goodey E, Angen M. A randomized, wait-list
controlled clinical trial: the effect of a mindfulness meditation-based
stress reduction program on mood and symptoms of stress in cancer
outpatients. Psychosom Med 2000;62:613 – 22.
[3] Teasdale JD, Segal ZV, Williams JMG, Ridgeway VA, Soulsby JM,
Lau MA. Prevention of relapse/recurrence in major depression by
mindfulness-based cognitive therapy. J Consult Clin Psychol 2000;
68:615 – 23.
[4*] Shapiro SL, Schwartz GE, Bonner G. Effects of mindfulness-based
stress reduction on medical and premedical students. J Behav Med
1998;21:581 – 99.
[5] Bishop SR. What do we really know about mindfulness-based stress
reduction? Psychosom Med 2002;64:71 – 84.
[6] Buchheld N, Grossman P, Walach H. Measuring mindfulness in in-
sight meditation (Vipassana) and meditation-based psychotherapy:
the development of the Freiburg mindfulness inventory. J Medit
Medit Res 2002;1:11 – 34.
[7] Goleman D. The meditative mind: the varieties of meditative expe-
rience. New York: Dutton, 1977.
[8] Lipsey MW, Wilson DB. Practical meta-analysis. Thousand Oaks
(CA): Sage Publications, 2000.
[9] Hedges LV, Olkins I. Statistical methods for meta-analysis. Orlando:
Academic Press, 1985.
[10*] Giommi F, Barendregt H, Oliemeulen L, van Hoof J, Tinge J, Coe-
nen A, van Dongen M. Mindfulness-based attention training as an
effective component in treating emotional disorders: a comparison
study. Unpublished findings, 2001.
[11] Hebert JR, Ebbeling CB, Olendzki BC, Hurley TG, Ma Y, Saal N,
Ockene JK, Clemow L. Change in women’s diet and body mass
following intensive intervention for early-stage breast cancer. J Am
Diet Assoc 2001;101:421 – 31.
[12] Hebert JR, Kabat-Zinn J, Clemow L, Massion AO. Effects of med-
itation-based stress reduction in women with breast cancer. Unpub-
lished findings, 2001.
[13] Cohen J. Statistical power analysis for the behavioral sciences. New
York: Academic Press, 1988.
[14] Carlson LE, Ursuliak Z, Goodey E, Angen M, Speca M. The effects
of a mindfulness meditation-based stress reduction program on
mood and symptoms of stress in cancer outpatients: 6-months
follow-up. Support Care Cancer 2001;9:112 – 23.
[15*] Kabat-Zinn J, Lipworth L, Burney R, Sellers W. Four-year follow-up
of a meditation program for the self-regulation of chronic pain:
treatment outcome and compliance. J Clin Pain 1987;2:159 – 73.
[16*] Miller JJ, Fletcher KE, Kabat-Zinn J. Three-year follow-up and
clinical implications of a mindfulness meditation-based stress reduc-
tion intervention in the treatment of anxiety disorders. Gen Hosp
Psychiatry 1995;17:192 – 200.
[17*] Reibel DK, Greeson JM, Brainard GC, Rosenzweig S. Mindfulness-
based stress reduction and health-related quality of life in a hetero-
geneous patient population. Gen Hosp Psychiatry 2001;23:183 – 92.
[18*] Sephton SE, Salmon P, Weissbecker I, Studts J. Effects of a medi-
tation program on symptoms of illness in women with fibromyalgia.
Unpublished findings, 2001.
[19*] Williams KA, Larkin K, Halperin A, Kolar MM. Mindfulness-
based stress reduction for coronary artery disease. Unpublished
findings, 2001.
[20*] Williams KA, Kolar MM, Reger BE, Pearson JC. Evaluation of a
wellness-based mindfulness stress reduction intervention: a con-
trolled trial. Am J Health Promot 2001;15:422 – 32.
[21*] Bruckstein DC. Effects of acceptance-based and cognitive behavio-
ral interventions on chronic pain management. Dissertation, Hofstra
University, USA, 1999.
[22*] Tiefenthaler U, Grossman P. Buddhist psychology’s potential con-
tribution to psychosomatic medicine: evidence from a mindfulness
program for fibromyalgia. Psychosom Med 2002;64:141 (Abstract).
[23*] Tiefenthaler-Gilmer U. Mindfulness meditation as clinical interven-
tion: a controlled study of a mindfulness-meditation program for
fibromyalgia patients [German]. Dissertation, University of Vienna,
Austria, 2002.
[24*] Perkins R. The efficacy of mindfulness-based techniques in the re-
duction of stress in a sample of incarcerated women. Dissertation,
Florida State University, 1998.
[25*] Murphy R. The effects of mindfulness meditation vs. progressive
relaxation training on stress, egocentrism, anger and impulsiveness
among inmates. Dissertation, Hofstra University, 1995.
[26*] Rosenzweig S, Reibel DK, Greeson JM, Hojat M, Brainard GC.
Mindfulness-based stress reduction reduces psychological distress
in medical students. Teach Learn Med 2003;15:88 – 92.
[27] Brown KW, Ryan RM. The benefits of being present: mindfulness
and its role in psychological well-being. J Pers Social Psychol
2003;84:822 – 48.
[28] Baer RA. Mindfulness training as a clinical intervention: a concep-
tual and empirical review. Clin Psychol 2003;10:125– 43.
Further Readings
Kabat-Zinn J. An outpatient program in behavioral medicine for chronic
pain patients based on the practice of mindfulness meditation: theoret-
ical considerations and preliminary results. Gen Hosp Psychiatry 1982;
4:33 – 47.
Kabat-Zinn J, Massion AO, Kristeller J, Peterson LG, Fletcher KE, Pbert L,
Lenderking WR, Santorelli SF. Effectiveness of a meditation-based
stress reduction program in the treatment of anxiety disorders. Am J
Psychiatry 1992;149:936 – 43.
Kristeller JL, Hallett CB. An exploratory study of a meditation-based
intervention for binge eating disorder. J Health Psychol 1999;4:357 – 63.
Kutz I, Leserman J, Dorrington C, Morrison CH, Borysenko JZ, Benson H.
Meditation as an adjunct to psychotherapy: an outcome study. Psy-
chother Psychosom 1985;43:209 – 18.
Majumdar M, Grossman P, Dietz-Waschkowski B, Kersig S, Walach H.
Does mindfulness meditation contribute to health? Outcome evaluation
of a German sample. J Altern Complement Med 2001;8:719 – 30.
P. Grossman et al. / Journal of Psychosomatic Research 57 (2004) 35–43 43