Which parts of lay-delivered therapy work: social support, activation, problem-solving

Design

Bayesian individual participant data component network meta-analysis of RCTs

Population

10,612 adults with depression or anxiety in 30 task-shared trials

Primary outcome

Symptom reduction at study endpoint

Effect

Social support −9.48 (−13.29 to −6.60); relaxation +7.97 (3.35 to 12.11)

This Bayesian component network meta-analysis used individual participant data from 30 of 34 randomised trials (10,612 adults, 72% women) of psychosocial interventions for depression and anxiety delivered by non-specialist providers. Each intervention was broken into its components to estimate what each one added.

Three components added clear benefit on symptom scores: strengthening social support (incremental mean difference −9.48, 95% credible interval −13.29 to −6.60), behavioural activation (−4.15, −7.48 to −0.05) and problem management (−4.08, −5.37 to −2.83). Relaxation was associated with worse outcomes (+7.97, 3.35 to 12.11), and cognitive reframing less clearly so (+5.17, 0.78 to 9.15). Component effects varied with baseline severity and sociodemographic factors.

This is directly relevant to Indian and other low-resource settings, where task-sharing through community health workers and counsellors is how most people with depression will receive any psychological care. It suggests programmes should be built around activation, problem-solving and mobilising support, and that time spent teaching relaxation may be better used elsewhere. The finding on relaxation and reframing comes from indirect comparisons and deserves confirmation before anyone drops them from specialist therapy.

• When designing or supervising lay-counsellor programmes, centre them on behavioural activation, problem management and strengthening social support.
• Help patients identify and re-engage one or two supportive people as an explicit treatment goal.
• Question the time given to relaxation training in brief task-shared packages for depression and anxiety.
• Do not extend the findings on reframing to specialist CBT; these trials tested brief, non-specialist delivery.

Why it matters

It tells stretched services which parts of a psychological package to keep when time is short.

Don't overread it

Component effects are modelled from indirect comparisons; the harm signal for relaxation needs confirming in direct trials.

The statistics, in plain English

An incremental mean difference is how much adding one component changes the symptom score at the end of treatment; negative is better. A 95% credible interval is the Bayesian equivalent of a confidence interval. The behavioural activation interval almost reaches zero (−0.05), so that benefit is less certain than social support or problem management.

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