Digital cognitive behavioural therapy for insomnia reduces insomnia severity in Armed Forces and Veteran populations
A systematic review and meta-analysis of 5 RCTs (n=309 intervention, n=249 control) found that digital CBT-I produced a statistically significant moderate-to-large reduction in insomnia severity compared to minimum contact controls, with substantial heterogeneity (I²=74%). Treatment gains were maintained up to 12 months, and three studies reported clinically meaningful ISI reductions of ≥6 points.
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Digital cognitive behavioural therapy for insomnia reduces insomnia severity in Armed Forces and Veteran populations The current body of evidence comprises 1 study and 1 meta-analysis. EvidenceHub rates the overall confidence at 49/100 (low).
The Claim
Digital cognitive behavioural therapy for insomnia reduces insomnia severity in Armed Forces and Veteran populations
This conclusion is most relevant to: Armed Forces personnel and veterans with insomnia (DSM-5 criteria or ISI ≥14).
What the Research Shows
The conclusion draws on 1 linked study. Highlights from the cited literature:
- ▸Efficacy of digital cognitive behavioural therapy for insomnia in Armed Forces and Veteran populations - A systematic review and meta-analysis of randomised controlled trials. (Sleep medicine, 2026) —
How It Works
The proposed biological pathway:
- ▸Digital CBT-I delivered via online platform
- ▸Participants engage in cognitive and behavioural modules targeting insomnia
- ▸Therapy addresses sleep habits, thought patterns, and relaxation
- ▸Result: Reduction in insomnia severity scores
Who Might Benefit
Evidence fit by population:
- ▸Armed Forces personnel and veterans with insomnia (DSM-5 criteria or ISI ≥14)
Recommended Dose
N/A
Limitations & Caveats
Important context when interpreting this evidence:
- ▸Limited number of included RCTs (n=5)
- ▸Overall risk of bias unclear or high due to limited reporting and attrition
- ▸Substantial heterogeneity driven by one study (Chao et al.)
Frequently Asked Questions
What is digital CBT-I?▼
Digital cognitive behavioural therapy for insomnia is an online or app-based version of CBT-I, which includes components like sleep restriction, stimulus control, cognitive restructuring, and relaxation training.
How effective is digital CBT-I for military populations?▼
The meta-analysis found a moderate-to-large reduction in insomnia severity, with effects maintained up to 12 months. Three of five trials reported clinically meaningful improvements (≥6 points on the Insomnia Severity Index).
What were the main limitations of the studies?▼
Limitations included small numbers of trials, unclear or high risk of bias due to poor reporting and high attrition, and substantial heterogeneity across studies.
Is digital CBT-I recommended as first-line treatment for insomnia in veterans?▼
While CBT-I is first-line, digital CBT-I is a scalable alternative. This review supports its efficacy, but the authors note that more research is needed to address engagement and attrition in military settings.
References
- 1.Rawcliffe AJ, Pereira SIR. “Efficacy of digital cognitive behavioural therapy for insomnia in Armed Forces and Veteran populations - A systematic review and meta-analysis of randomised controlled trials..” Sleep medicine, 2026. PMID: 42119336 DOI: 10.1016/j.sleep.2026.108974