摘要:Insomnia is one of debilitating disorders that presents in many psychosocial and physical states. Several studies have focused on the evidence-based efficacy of cognitive behaviour therapy (CBT) for sleep disorders over the years. Nonetheless, little have been done in the area of identifying the specific components, mediators and moderators associated with CBT for insomnia (CBT-I). This study aims at bringing to light the variables and mechanism supporting CBT-I. The systematic review shows that although CBT-I is noted as effective, much research is needed to validate its advancement.