Can lay counsellors deliver one flexible therapy for many problems?
Refugees treated by briefly trained local counsellors using a mix-and-match therapy improved far more on depression and trauma symptoms than people waiting for treatment.
Source
A transdiagnostic community-based mental health treatment for comorbid disorders: development and outcomes of a randomized controlled trial among Burmese refugees in Thailand
Study at a glance
- Design
- RCT — Single-site, two-arm, 1:1, assessor-blinded wait-list randomised controlled trial with baseline and ~4-month follow-up
- N
- N=347 · 347 randomised adults in the intention-to-treat sample; 274 had follow-up assessments (missing data multiply imputed)
- Population
- Burmese adult trauma survivors displaced to Mae Sot, Thailand, with moderate-to-severe depression and/or post-traumatic stress symptoms
- Outcome
- Depression (locally adapted HSCL-25) and post-traumatic stress symptoms (adapted HTQ); secondary: functional impairment, anxiety, aggression, alcohol use
Structured fields used in claim comparison tables when every cited study has a complete layer.
What they did
The researchers first used qualitative interviews to adapt symptom questionnaires and a therapy called the Common Elements Treatment Approach (CETA) for Burmese refugees in Thailand. CETA teaches counsellors a menu of therapy components (such as psychoeducation, cognitive coping and gradual exposure to trauma memories) and rules for choosing, ordering and dosing them for each client. Adults with trauma exposure and moderate-to-severe depression or post-traumatic stress symptoms were randomly assigned to weekly CETA sessions with lay refugee counsellors or to a wait-list, and interviewers who did not know group assignment reassessed everyone about 4 months later.
What they found
Both groups improved, but the CETA group improved much more: the extra reduction in depression and post-traumatic stress scores corresponded to very large effect sizes (d = 1.16 and d = 1.19). Anxiety (d = 0.79), functional impairment (d = 0.60) and aggression (d = 0.58) also improved more with CETA, but alcohol use fell similarly in both arms. Results held when people lost to follow-up were assumed to have much worse outcomes, and clients who finished CETA averaged about 9.7 weekly sessions.
The limits
What it doesn't show
Because the comparison was a wait-list rather than an active treatment, the trial cannot separate the specific CETA techniques from the general benefit of regular supportive contact with a counsellor. Participants knew their group, so expectation effects are possible, and only 79% of participants were reassessed, with more losses among controls. Outcomes were measured only once, shortly after treatment, so durability is unknown, and the intensive supervision from US-based trainers may not be sustainable in routine services.
Key terms
- Transdiagnostic treatment
- A therapy built from components shared by several evidence-based treatments, so one approach can target depression, anxiety and trauma symptoms together.
- Task-sharing
- Delivering care through workers with limited formal training (here, lay counsellors) under supervision, to widen access where professionals are scarce.
- Wait-list control
- A comparison group that receives the treatment only after the study period, so the trial compares treatment against no treatment for that time.
- Intention-to-treat analysis
- Analysing everyone in the group they were randomised to, whether or not they completed treatment, to preserve the benefits of randomisation.
- Cohen's d
- A standardised effect size; here the difference in improvement between arms divided by the pooled baseline standard deviation (0.2 small, 0.5 medium, 0.8 large).
- Multiple imputation
- A way of handling missing data by filling in several plausible values based on other information and pooling the results.
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Quiz yourself
What was the comparison condition in the CETA trial?
Common questions
Why not compare CETA with another therapy instead of a wait-list?
The authors argue there was no established treatment for this population, and a head-to-head comparison could show both groups improving through regression to the mean without proving either works; the trade-off is that attention effects are not controlled.
Does this prove the lay counsellors were as good as professionals?
No. The trial compared CETA with no treatment, not with professional care; it shows lay counsellors with close supervision can deliver an effective flexible therapy.
Why did the wait-list group also improve?
Symptoms often drift toward average over time (regression to the mean), and controls also received monthly safety check-in calls; that is why the effect is measured as the extra improvement in the CETA arm.
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