Prevalence of HIV and Syphilis Infection among Men Who Have Sex with Men in China: A Meta-Analysis

Table 1

Meta-regression and subgroup analyses of HIV and syphilis prevalence among men who have sex with men in China.

Study characteristic	Stratified meta-analysis
	HIV		Syphilis
	Prevalence (95% CI)	Meta-regression (, value)	Prevalence (95% CI)	Meta-regression (, value)
Sample size
500	5.9% (5.0–7.0%)	1.017	11.0% (9.3–12.9%)	1.007
500	7.2% (5.8–8.9%)		11.5% (9.8–13.5%)
Sampling methods
RDS	7.4% (5.7–9.7%)	0.996	9.1% (7.1–11.6%)	1.009
Snow ball	7.2% (5.4–9.4%)		13.3% (10.8–16.2%)
Multiple Methods	5.9% (4.5–7.7%)		10.5% (8.2–13.3%)
Others	6.2% (5.6–7.4%)		12.2% (10.0–14.9%)
Economy status
15,000$	7.5% (6.5–8.6%)	0.971	8.8% (7.7–10.0%)	1.074
15,000$	6.1% (4.7–8.0%)		15.5% (13.0–18.3%)
Published year
2009-2010	5.9% (5.1–6.9%)	1.017	12.1% (10.6–13.7%)	−0.980
2011–2013	7.6% (6.1–9.5%)		9.6% (7.6–12.1%)