Table 1.

Social demographic characteristics, sexual behavior, and syphilis among mid-age FSWs at three study sites

	Nanning		Hefei		Qingdao		All sites
	N	%	N	%	N	%	Yes	%
Education
Primary or less	151	34.5	202	47.9	193	43.0	546	43.8
Middle school	213	52.3	171	42.2	193	46.5	577	46.4
High school or above	54	13.3	34	9.9	34	10.4	122	9.8
Marital status
Unmarred	52	13.3	47	13.1	17	2.5	116	9.3
Married	237	57.6	226	54.5	147	38.6	610	49.0
Divorced or widowed	129	29.2	134	32.4	256	58.9	519	41.7
Residency
Urban	103	27.2	162	41.1	115	33.6	380	30.5
Rural	315	73.8	245	58.9	305	66.4	865	69.5
Had diagnosed STD	28	4.9	19	4.6	145	29.2	192	15.4
Prevalent syphilis	30	6.8	134	33.6	125	32.0	289	23.2
Active syphilis	24	5.4	68	17.3	36	9.9	128	10.3
Had sex in the past 24 h	220	52.8	167	42.0	355	84.5	742	60.1
Had sex with clients	186	84.5	102	61.1	341	96.1	629	84.8
Had sex with husband	22	10.0	26	15.6	33	9.3	81	10.9
Had sex with boyfriends	52	23.6	43	25.7	64	18.0	159	21.4
Continuous variables	Median 25th–75th percentile
Age (years)	37	36–40	38	35–43	42	36–48	38	35–43
Duration of sex work (years)	3.0	1.8–5.0	1.3	0.5–3.0	6.2	4.0–9.9	3.2	1.3–5.8
HIV knowledge	9	8–10	7	4–9	8	6–9	8	7–8
Attitude to condom use	13	12–15	12	10–15	13	12–15	13	11–15