Fig 1.
Flowchart.
Table 1.
Characteristics of participants at enrollment.
Fig 2.
Adjusted odds ratios for factors associated with syphilis infection at baseline among participants.
Fig 3.
Adjusted odds ratios for factors associated with syphilis infection during follow up among participants.
Fig 4.
Adjusted odds ratios for factors associated with syphilis re-infection during follow-up among participants.