Chung KF, et al. - The efficacy of sleep hygiene education (SHE) for poor sleep or insomnia was investigated in this systematic review. Compared to cognitive-behavioural therapy for insomnia, SHE was less effective. However, a firm conclusion could not be drawn on whether SHE had a role in a stepped-care model for insomnia in primary care due to unanswered methodological and implementation issues.