Effect of minimal cognitive behavioral therapy for patients with acute insomnia: A systematic review and meta-analysis.

These findings provide preliminary evidence that minimal CBT-I may be a feasible and effective preventive measure against chronic insomnia. However, future RCTs and effectiveness trials are necessary to validate, with greater statistical power, the hypothesis that CBT-I can prevent transition from acute to chronic insomnia, given the limited number of studies in our meta-analysis.