Figure 1

Study selection and exclusion flow diagram. Identification, number of articles identified through the literature search including grey literature; Screening, number of articles screened according to the criteria described in main text; Eligibility: number of screened articles that met the inclusion criteria; Included, number of studies included in the review and meta-analysis. *Literature search identified studies on other mental health issues as a part of the research project but those studies were not included in the present analysis.