Table 3.

Multivariable model to assess association between a positive rapid test for syphilis and method used to sample female sex workers

Model	Variables included	Prevalence difference	95% CI	Prevalence ratio	95% CI
1	Method	16.8	3.5 to 30.0	3.3	1.5 to 7.2
2	Method, age	16.7	3.6 to 29.7	3.3	1.5 to 7.2
3	Method, age, urban district/county	10.2	4.0 to 16.3	2.2	1.2 to 3.9

Prevalence difference refers to the absolute difference in positive rapid syphilis test between Priorities for Local AIDS Control Efforts and respondent-driven sampling (RDS). Weights for RDS respondents are from RDS-II estimation procedure.