Protocol
MBSR (Mindfulness-Based Stress Reduction) 8-week program
Pooled randomized trials find small to moderate reductions in self-reported anxiety, depression and distress: Goyal 2014 (PMID PubMed ID: the permanent number the US National Library of Medicine gives a published paper. Each one links to that paper's record on PubMed. 24395196) pooled 47 trials of mindfulness meditation programs generally, not MBSR alone, against active controls; Khoury 2015 (PMID 25818837) pooled 29 MBSR studies in healthy adults; Galante 2021 (PMID 33428616) pooled 136 trials in nonclinical settings and found benefit against no intervention but no superiority over specific active treatments.
At a glance
MBSR is an eight-week group course in mindfulness. It meets once a week, with daily practice at home. Three pooled reviews from separate teams found small to moderate drops in anxiety, depression and stress, as reported by the people themselves. In one study of people with anxiety disorders, rated by experts who did not know the groups, it did about as well as a common anxiety drug. It has not been shown to beat talk therapy, exercise or medicine. Physical health and sleep were not covered.
- What was measured
- Stress, anxiety, depression and distress, from questionnaires people filled in about themselves.
- How big
- Between groups, MBSR had a moderate effect (a standard score of .53), with large effects on stress and moderate effects on anxiety, depression and distress, holding at an average of 19 weeks.Read from the summary of PMID 25818837.
- Who it applies to
- Healthy adults and adults in nonclinical settings, plus one trial in adults with anxiety disorders, mean age 33 and mostly women.
- Safety
- This record lists no specific safety warning for the program.
- Compared with
- No program, a wait list, or other comparison programs.
- Certainty
- Grade B, resting on: Meta-analysis A study that pools the numbers from several trials into one combined estimate. of randomized trials.
- What would change this grade
- Could rise to A with: Randomized trial of the 8-week MBSR program against an attention-matched active control, with outcomes scored by clinicians blind to group, run by at least two independent groups. Who: Adults with a diagnosed anxiety or depressive disorder, at least 150 per arm. Measured: A blinded clinician-rated scale such as the Hamilton Anxiety or Montgomery-Asberg Depression scale as the primary outcome. Length: 8 weeks of treatment with follow-up to at least 6 months.
- Cost
- No price recorded yet.
- Sources
- 4 studies cited on this record, listed under Sources.
Pooled randomized trials find small to moderate reductions in self-reported anxiety, depression and distress: Goyal 2014 (PMID 24395196) pooled 47 trials of mindfulness meditation programs generally, not MBSR alone, against active controls; Khoury 2015 (PMID 25818837) pooled 29 MBSR studies in healthy adults; Galante 2021 (PMID 33428616) pooled 136 trials in nonclinical settings and found benefit against no intervention but no superiority over specific active treatments. The one trial with a blinded clinician scale found MBSR noninferior to escitalopram in anxiety disorders (Hoge 2023; PMID 36350591). An 8-week structured group program with daily home practice; the cited abstracts do not state session length. Self-reported outcomes cap the letter at B.
Why this letter
Why this gradeThe reasoning, and what the grade does not cover.
Grade B on self-reported anxiety, depression and distress. Three independent pooled analyses of randomized trials agree on small to moderate benefit against no intervention or active controls: Goyal et al. (2014; PMID 24395196; 47 trials of mindfulness programs generally), Khoury et al. (2015; PMID 25818837; 29 MBSR studies in healthy adults) and Galante et al. (2021; PMID 33428616; 136 trials in nonclinical settings).
WHY NOT Athe outcomes are questionnaires; the one trial with a blinded clinician scale (Hoge et al., 2023; PMID 36350591) is a single noninferiority comparison with escitalopram and no placebo An inactive substitute made to look like the real treatment, so participants cannot tell which one they received. arm, which cannot lift the letter.
WHY NOT Cthe pooled results replicate across groups.
WHAT THIS GRADE DOES NOT COVERsuperiority over specific active treatments such as cognitive behavioral therapy, exercise or medication, which no pooled analysis shows; app-based programs, which the cited reviews did not grade and for which this record makes no comparative claim; rumination and emotional regulation, which the 2014 pooled analysis (PMID 24395196) did not assess; physical health outcomes such as blood pressure or heart disease; and sleep.
A grade describes the human evidence for a named use. It is not advice, and it is not a judgment on any individual prescription. How the letters are decided →
Who responds: this record's trial reading reports no subgroup that identifies who responds.
Evidence notes: meta-analysis
Endpoint The outcome a trial measures to decide whether the treatment worked, such as heart attacks, blood pressure or a symptom score. graded: Self-reported anxiety, depression and pain (self_report)
Last reviewed: October 2026
The trial that would change this grade.
Positive trials of this shape from independent research groups would move this entry to A.
Why the current trials fall short
The pooled benefit is in self-reported questionnaires, which caps the record at B. The one trial with a blinded clinician scale was a single noninferiority comparison with escitalopram and no placebo or attention control.
ClinicalTrials.gov, the public registry run by the U.S. National Library of Medicine, lists studies that are recruiting volunteers. The link below searches it for Mindfulness-Based Stress Reduction among studies recruiting now. EBL has no relationship with any listed study and receives no payment for this link.
Search recruiting studies of Mindfulness-Based Stress Reduction on ClinicalTrials.gov
Dose, form and timing
The PSS-10 (Perceived Stress Scale) or a validated anxiety or depression questionnaire at baseline, week 4 and program end, which is what the pooled trials measured. Session attendance is the process measure.
As studiedDose, form, population and duration for every use.
A grade describes the intervention that was tested. Where the product on the shelf differs from it, this says so.
Safety
No safety data. Each caution on this record, sorted by what it rests on.
None recorded.
None recorded.
None recorded.
None recorded.
No safety data: EBL has found no trial or report of harm for this record. That is an absence of evidence, not a finding of safety.
Grade history
How this letter has changedLatest: No. 224 · October 2026 · Corrected.
The description said a 32-trial meta-analysis; Goyal et al. (JAMA Intern Med, 2014; PMID 24395196) pooled 47 trials of mindfulness meditation programs generally, not MBSR alone, found only low-strength evidence for stress, did not assess rumination or emotional regulation, and found no superiority over active treatments, none of which the record said. The uncited claim that apps have smaller effects than instructor-led MBSR is removed. Added: Khoury et al. (J Psychosom Res, 2015; PMID 25818837), 29 MBSR studies in healthy adults; Galante et al. (PLoS Med, 2021; PMID 33428616), 136 trials, with its null against specific active controls; and the TAME trial (Hoge et al., JAMA Psychiatry, 2023; PMID 36350591), MBSR noninferior to escitalopram on a blinded clinician scale. Replicated The same finding reproduced by a separate research group. A result seen once can be chance or bias; a replicated one is harder to explain away. pooled self-report evidence is B, unchanged. Applied the written grade definition under the editor's standing instruction of October 2026 (Arnold Sandlow, D.C.).PMID 24395196 PMID 25818837 PMID 33428616 PMID 36350591
The record carried a not-replicated flag while its B rested on a pooled analysis of randomized trials (Goyal et al., JAMA Intern Med, 2014; PMID 24395196). The flag describes a single trial nobody has repeated; a meta-analysis of independent randomized trials is replication by definition, and what caps this letter at B is the endpoint, not the absence of a second trial. Flag removed, letter unchanged. Applied the written grade definition under the editor's standing instruction of October 2026 (Arnold Sandlow, D.C.).PMID 24395196
Every change to a letter on this site is dated and published. The full evidence log →
Sources
- Citations
- Every paper cited on this page is matched to its PubMed record on every build.
- Retractions
- None of these papers is retracted or under a journal expression of concern. PubMed is checked again on every build.
- Read against the papers
- October 2026. By the EBL editor, Arnold Sandlow, DC.
- Outside review
- Not yet done. No reviewer outside EBL has checked this record.
What each of these checks can and cannot show: evidence integrity.
The evidence, in fullFour papers, each linked to its PubMed record.
Goyal et al. (JAMA Intern Med, 2014; PMID 24395196): meta-analysis of 47 randomized trials, 3,515 participants, of mindfulness meditation programs generally (MBSR, MBCT and others); moderate evidence of improved anxiety, depression and pain against active controls, low evidence for stress and distress, and no evidence that the programs beat active treatments such as drugs, exercise or other behavioral therapies. Khoury et al. (J Psychosom Res, 2015; PMID 25818837): meta-analysis of 29 MBSR studies in healthy adults, 2,668 participants; moderate between-group effects (Hedges g 0.53), large on stress and moderate on anxiety and depression, maintained at about 19 weeks. Galante et al. (PLoS Med, 2021; PMID 33428616): meta-analysis of 136 randomized trials of mindfulness-based programs in nonclinical settings, 11,605 participants; against no intervention, anxiety (SMD -0.56), depression (-0.53) and distress (-0.45) improved, with prediction intervals crossing zero; against nonspecific active controls only depression improved, against specific active controls no superiority, and only the distress effect survived removal of higher-risk trials. Hoge et al. (JAMA Psychiatry, 2023; PMID 36350591), the TAME trial: 276 adults with anxiety disorders randomized to 8 weeks of MBSR or escitalopram; MBSR noninferior on the blinded clinician-rated Clinical Global Impression of Severity, a noninferiority design with no placebo arm. Grade B: replicated pooled randomized evidence on self-reported outcomes, the ceiling for self-report.
How EBL searched for the trials (1 search)
The search that was run, what it returned, and what was left out and why, so the absence of evidence can be checked as well as its presence.
("mindfulness-based stress reduction"[tiab] OR MBSR[tiab]) AND (anxiety[tiab] OR depression[tiab] OR distress[tiab]) AND meta-analysis[pt]PubMed watch: does a new study change the grade? (nothing new)
No new paper matching the search behind this grade has been added to PubMed since October 2026.
Last run October 2026. A letter on EBL moves only after a logged review. A new paper never moves a letter by arriving: it is read, the answer is written here, and any change to the letter is published in the evidence log.
Disclosure
Educational use only · Not medical advice · EBL grades published human evidence and does not recommend treatment. Stopping a prescription is a decision for your physician.
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