Prevalence ratios comparing pooled HIV prevalence among men who engage in transactional sex to general population men aged 15 and older.

1Among studies confirming HIV infection with a biological assay and among studies reporting ≥50 participants;
2All prevalence ratios significant (P<0.05) except for Bangladesh and Canada.
N = number of subjects; k = number of studies; I2 = variation in pooled prevalence ratio due to heterogeneity; 95% CI = 95% Confidence Interval.