Are psychological interventions effective on anxiety in cancer patients? A systematic review and meta-analyses.

Low psychological distress at baseline and nonevidence-based interventions were the main factors identified for low effectiveness. Screening and assessment to determine clinical levels of anxiety in patients with cancer should be considered in future trials as an inclusion criterion before providing psychological interventions. Systematic review registration: PROSPERO: International Prospective Register of Systematic Reviews: CRD42017056132.