Internet-based cognitive behavioural therapy for subthreshold depression: a systematic review and meta-analysis

Background Subthreshold depression has a considerable impact on individuals’ subjective well-being and psychosocial functioning and is a predictor of major depressive disorder. Internet-based cognitive behavioural treatments (iCBTs) have been used to reduce the symptoms of subthreshold depression. This meta-analysis aims to systematically review evidence indicating the efficacy of iCBT programs on the improvement of depressive symptoms in this population.