Cited by 382Posttraumatic Stress Disorder ResearchPsychotherapy Techniques and ApplicationsMigration, Health and Trauma

Dropout from psychological therapies for post-traumatic stress disorder (PTSD) in adults: systematic review and meta-analysis

Open access
Lewis, Catrin, Roberts, Neil P., Gibson, Samuel, Bisson, Jonathan I.·2020·European Journal of Psychotraumatology

Abstract

Background: Despite the established efficacy of psychological therapies for post-traumatic stress disorder (PTSD) there has been little systematic exploration of dropout rates.Objective: To ascertain rates of dropout across different modalities of psychological therapy for PTSD and to explore potential sources of heterogeneity.Method: A systematic review of dropout rates from randomized controlled trials (RCTs) of psychological therapies was conducted. The pooled rate of dropout from psychological therapies was estimated and reasons for heterogeneity explored using meta-regression.Results:: The pooled rate of dropout from RCTs of psychological therapies for PTSD was 16% (95% CI 14–18%). There was evidence of substantial heterogeneity across studies. We found evidence that psychological therapies with a trauma-focus were significantly associated with greater dropout. There was no evidence of greater dropout from therapies delivered in a group format; from studies that recruited participants from clinical services rather than via advertisements; that included only military personnel/veterans; that were limited to participants traumatized by sexual traumas; that included a higher proportion of female participants; or from studies with a lower proportion of participants who were university educated.Conclusions: Dropout rates from recommended psychological therapies for PTSD are high and this appears to be particularly true of interventions with a trauma focus. There is a need to further explore the reasons for dropout and to look at ways of increasing treatment retention.

The claims and statistics of this paper haven’t been checked yet.

Run the check — free, no account needed. It reads the open-access text and checks the sources it cites.

A few free checks a day · papers already verified open instantly · results are public

Integrity signals

Registry

Crossref · 10.1080/20008198.2019.1709709

Cites

178 of 178 references verified0 citation errors · 0 not checkable

Statistics

Claims the paper makes

The claims and statistics of this paper haven’t been checked yet.

Run the check — free, no account needed. It reads the open-access text and checks the sources it cites.

A few free checks a day · papers already verified open instantly · results are public

Claims other papers make about this one

Each is checked against this paper’s own text: does it say what the citing paper says it does?

  • There remains a certain level of dropout rate in trauma-focused psychotherapy, with the pool dropout rate at 16%.

    “First, there remains a certain level of dropout rate in trauma-focused psychotherapy, with the pool dropout rate at 16% [32].”

    From Effects of mindfulness-based cognitive therapy for Chinese adults with PTSD symptoms: protocol for a randomised controlled trial (2024) · cites this paper as [32]

    The Discussion (Main findings; page unavailable) reports a pooled dropout rate of 16% for all psychological therapies for PTSD, not specifically trauma-focused psychotherapy. The Results (Meta-regression; page unavailable) report 18% dropout for trauma-focused therapies. The claim is right that dropout occurs, but assigns the 16% estimate to the wrong group. (LLM, conf=0.92)

    Experimental — accuracy not yet measured
  • Studies have demonstrated notable dropout rates from trauma-focused therapies for PTSD.

    “Despite the efficacy of these treatments, studies have demonstrated notable dropout rates (Lewis et al., 2020) and persistent residual symptoms (Larsen et al., 2019).”
  • A meta-analysis of PTSD treatment dropout rates (Lewis et al., 2020) found that the mean rate for nine trauma-focused cognitive behavioral group therapy studies was 24% (95% CI: 16-33%).

    “A meta-analysis of PTSD treatment dropout rates (Lewis et al., 2020) found that the mean rate for nine trauma-focused cognitive behavioral group therapy studies was 24% (95% CI: 16–33%).”
  • Considering the study's definition of completion and the moderate rate of attrition, the ACT intervention was associated with a higher drop-out rate compared to the average rate for group-based trauma-focused therapies.

    “Considering our study’s definition of completion and the moderate rate of attrition, our ACT intervention was associated with a higher drop-out rate compared to the average rate for group-based trauma-focused therapies.”

Self-check

Percentages, sums and reported differences re-computed from the paper’s own numbers.

The self-check needs the paper’s full text.

Cites

Flagged first, then by citations

Research works printed but not linked: 2

  1. National Institute for Health and Care Excellence (NICE). (2018). Post-traumatic stress disorder (NICE guideline NG116). Retrieved from https://www.nice.org.uk/guidance/ng116 31211536
  2. Tarrier, N., Pilgrim, H., Sommerfield, C., Faragher, B., Reynolds, M., Graham, E., & Barrowclough, C. (1999b). A randomized controlled trial of cognitive therapy and imaginal exposure in the treatment of chronic posttraumatic stress disorder. Journal of Consulting & Clinical Psychology, 67, 13– 18. doi: 10.1037/0022-006X.67.1.13 10028204 · DOI

Cited by

Sorted by citations

Authors
Lewis, C., Roberts, N. P., Gibson, S., & Bisson, J. I.
Affiliations
  • Cardiff University (GB)
  • Cardiff and Vale University Health Board (GB)
Corresponding author
Lewis, Catrin
Venue
European Journal of Psychotraumatology
Published
2020-03-09
Volume
11
Issue
1
Pages
1709709-1709709
ISSN
2000-8066 (ISSN-L)
OpenAlex
W2994854287
Cited by
382
References
178
Citations by year
2026: 58 · 2025: 77 · 2024: 85 · 2023: 66 · 2022: 47 · 2021: 37 · 2020: 12
FWCI
3.17
Type
journal article
Language
en
Open access
Locations
  • European Journal of Psychotraumatology (publishedVersion, cc-by-nc)
  • PubMed Central (publishedVersion, cc-by-nc)
  • PubMed (publishedVersion)
  • ORCA Online Research @Cardiff (Cardiff University) (acceptedVersion)
  • DOAJ (DOAJ: Directory of Open Access Journals) (submittedVersion, cc-by-sa)
Funders
unfunded
Topics
  • Social Sciences › Psychology › Clinical Psychology › Posttraumatic Stress Disorder Research
  • Social Sciences › Psychology › Clinical Psychology › Psychotherapy Techniques and Applications
  • Social Sciences › Psychology › Clinical Psychology › Migration, Health and Trauma
Keywords
post-traumatic stress disorder, psychotherapy, treatment discontinuation, treatment retention, trauma-focused psychotherapy, group therapy, military personnel, veterans, sexual trauma, predictors of dropout

About these checks

Registry, retraction, Cites and statistics results are computed, not judged, with one exception: a printed reference that no index lists is read once by a model before it counts as a citation error. Claims are extracted by a model and kept only when their quote appears verbatim in the text; each cited source is then checked, with a model’s help, for whether it says what the claim relies on. Those verdicts can be wrong — read the claim’s quote and the cited source before relying on one.

Statistics and arithmetic are recomputed, not judged.

Confidence bands are shown only for fields calibrated on our annotated test set. None is calibrated yet, so no band is shown.

What counts as a claim ›How we measure confidence ›How we check this ›

Are you an author, or do you see a problem with this page? Request a review