Effectiveness of morning blue light therapy on sleep and daytime symptoms in adults with primary and comorbid insomnia: A systematic review and meta-analysis of randomized control trials.
Hinin Wasilah, Aychew Gidafie, Vivi Leona Amelia et al.
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In 30 seconds
This systematic review and meta-analysis evaluated the effectiveness of morning blue light therapy on sleep and daytime symptoms in 444 adults with primary and comorbid insomnia. The analysis revealed that blue light therapy significantly improved subjective sleep quality (mean difference = -1.895) and excessive daytime sleepiness (mean difference = -0.970), along with several objective sleep parameters. The study utilized a random-effects model to assess pooled effects across various studies.
Key findings
- Blue light therapy improved subjective sleep quality with a mean difference of -1.895.
- Excessive daytime sleepiness was reduced with a mean difference of -0.970.
- Significant improvements were noted in sleep onset latency (Hedges' g = -0.545) and waking after sleep onset (Hedges' g = -0.563).
- Sleep efficiency showed a moderate improvement (Hedges' g = 0.429).
Why it matters
Insomnia is a prevalent condition that significantly impacts quality of life. This study suggests that blue light therapy may serve as a non-pharmacological option to improve sleep quality and reduce daytime sleepiness, which could be beneficial for patients with insomnia.