Table 1 Demographic characteristics of FSWs

Age; median (interquartile range)

23.5(20,34)

Wages (yuan); Freq (%)

  < 5000

7(31.8%)

  5000–9999

9(40.9%)

  > 10,000

6(27.3%)

Registered permanent residence; Freq (%)

 Rural areas

19(86.4%)

 Urban areas

3(13.6%)

Educational attainment; Freq (%)

 Primary school or lower

9(40.9%)

 Junior middle school

7(31.8%)

 Senior high school or higher

6(27.3%)

Regular sexual partner (husband/boyfriend); Freq (%)

 Yes

17(77.3%)

 No

5(22.7%)

Ever been pregnant; Freq (%)

 Yes

14(63.6%)

 No

8(36.4%)

HIV test; Freq (%)

 Positive

2(9.1%)

 Negative

15(68.2%)

 Never tested

5(22.7%)