Study characteristics of 33 samples included in meta-analysis^*.

*Table notes: Recall window refers to the recall window of bisexual behavior in each study (A = MSMW ≤6 months; B = MSMW ≤1 year; C = MSMW<3 years; D = MSMW ≥3 years). Sampling strategy refers to recruitment technique (1 = time/location sampling; 2 = respondent-driven sampling; 3 = convenience sampling; 4 = HIV/STI clinic sampling; 5 = population-based sampling). HIV test basis refers to the form of assessment of HIV status (0 = self-report; 1 = serologic). *Refers to studies that focused only on MSMW. **Catania et al inferred the validity of participants’ self-reports by conducting a representative sample of serologic testing.