Network meta-analysis examining efficacy of components of cognitive behavioural therapy for insomnia.
Level 1 - systematic review of randomized trials
Systematic review and component network meta-analysis of randomized/clinical trials.
PubMed 39504928 · doi:10.1016/j.cpr.2024.102507
What was done
A pre-registered systematic review and component network meta-analysis across PubMed, MEDLINE, PsycINFO, PsycARTICLES, and CINAHL to determine the relative efficacy of individual cognitive behavioural therapy for insomnia (CBT-I) components (psychoeducation, sleep restriction, stimulus control, cognitive therapy, and relaxation therapy). The analysis included 80 studies comprising 15,351 participants (mean age 44.9 years, 70.1% female) evaluating baseline-to-post-treatment effect sizes (Cohen's d).
What was found
For the primary outcome of insomnia severity, sleep restriction therapy demonstrated a significant beneficial effect (d = -0.45; 95% CI: [-0.63; -0.36]). Sleep restriction also improved self-reported sleep continuity and sleep quality. Stimulus control therapy improved self-reported and objective total sleep time. Psychoeducation, relaxation therapy, and cognitive therapy showed no significant unique effects, and no further significant effects of any CBT-I component on objective sleep parameters were observed.
Why it matters
Standard CBT-I is a multi-component protocol; this study identifies sleep restriction and stimulus control as the key active therapeutic ingredients, informing more streamlined and targeted clinical delivery.
Limits
The abstract identifies common sources of bias across included trials, including lack of blinding, missing outcome data, and absence of pre-registered study protocols. Most components showed no measurable benefit on objective sleep parameters.
Cited by
- supports Dismantling studies of Cognitive Behavioral Therapy for Insomnia (CBT-I) show that sleep restriction and stimulus control are the most critical components for achieving positive outcomes.