Table 1. Distribution of socio-demographics, sexual behavior and HIV/syphilis prevalence among men who have sex with men in China, 2008–2009 (N = 2958).

	CVI(n = 563)			Non-CVI(n = 2395)			Total(n = 2958)
Variables	Frequency	Percent	95% CI	Frequency	Percent	95% CI	Total	Percentage
Age
<20	25	4.44	2.73,6.15	153	6.39	5.41,7.37	178	6.02
20–29	200	35.52	31.56,39.49	1499	62.59	60.65,64.53	1699	57.44
30–39	177	31.44	27.59,35.29	431	18	16.46,19.54	608	20.55
40–49	113	20.07	16.75,23.39	180	7.52	6.46,8.57	293	9.91
50 and above	48	8.53	6.21,10.84	132	5.51	4.60,6.43	180	6.09
Marital Status
Never Married	205	36.41	32.43,40.40	1957	81.71	80.16,83.26	2162	73.09
Ever Married	358	63.59	59.60,67.57	438	18.29	16.74,19.84	796	26.91
Residency
City under study	267	47.42	43.29,51.56	1257	52.51	50.50,54.51	1524	51.54
The province of the city under study	154	27.35	23.66,31.05	536	22.39	20.72,24.06	690	23.33
Other provinces	142	25.22	21.62,28.82	601	25.1	23.37,26.84	743	25.13
Race
Han	556	98.76	97.84,99.67	2329	97.28	96.63,97.94	2885	97.57
Others	7	1.24	0.33,2.16	65	2.72	2.06,3.37	72	2.43
Education
Primary School or below	26	4.62	2.88,6.36	42	1.75	1.23,2.28	68	2.3
Junior or Senior High school	385	68.38	64.53,72.24	1094	45.7	43.70,47.69	1479	50.02
College or above	152	27	23.32,30.68	1258	52.55	50.55,54.55	1410	47.68
Monthly income
No income	40	7.1	4.98,9.23	428	17.88	16.34,19.41	468	15.83
1 to 1000	54	9.59	7.15,12.03	417	17.42	15.90,18.94	471	15.93
1001 to 2000	221	39.25	35.21,43.30	715	29.87	28.03,31.70	936	31.65
2001 to 3000	141	25.04	21.45,28.63	419	17.5	15.98,19.03	560	18.94
3001 to 4000	64	11.37	8.74,14.00	237	9.9	8.70,11.10	301	10.18
More than 4000	43	7.64	5.44,9.84	178	7.44	6.38,8.49	221	7.47
Venue
Pub, Disco, Tearoom, or Club	115	20.43	17.09,23.77	321	13.41	12.04,14.77	436	14.74
Spa or bathhouse, Sauna or Massage	126	22.38	18.93,25.83	235	9.82	8.62,11.01	361	12.21
Public Restroom, or Public Lawn	100	17.76	14.60,20.93	223	9.32	8.15,10.48	323	10.92
Internet	164	29.13	25.37,32.89	1446	60.4	58.44,62.36	1610	54.45
Others	58	10.3	7.78,12.82	169	7.06	6.03,8.09	227	7.68
Sexual orientation
Homosexual	109	19.36	16.09,22.63	1517	63.37	61.44,65.30	1626	54.99
Heterosexual	23	4.09	2.45,5.73	20	0.84	0.47,1.20	43	1.45
Bisexual	394	69.98	66.18,73.78	736	30.74	28.89,32.59	1130	38.21
Not sure	37	6.57	4.52,8.63	121	5.05	4.18,5.93	158	5.34
Social network size
2 or less	118	20.96	17.59,24.33	266	11.11	9.85,12.37	384	12.98
3 to 9	245	43.52	39.41,47.62	891	37.2	35.27,39.14	1136	38.4
10 and above	200	35.52	31.56,39.49	1238	51.69	49.69,53.69	1438	48.61
Knowledge
No	138	24.51	20.95,28.08	467	19.5	17.91.21.09	605	20.45
Yes	425	75.49	71.92,79.05	1928	80.5	78.91,82.09	2353	79.55
Coverage
No	226	40.14	36.08,44.20	704	29.39	27.57,31.22	930	31.44
Yes	337	59.86	55.80,63.92	1691	70.61	68.78,72.43	2028	68.56
City
Nanjing	74	13.14	10.34,15.94	357	14.91	13.48,16.33	431	14.57
Suzhou	86	15.28	12.29,18.26	194	8.1	7.01,9.19	280	9.47
Yangzhou	115	20.43	17.09,23.77	185	7.72	6.65,8.79	300	10.14
Chongqing	58	10.3	7.78,12.82	559	23.34	21.65,25.04	617	20.86
Guangzhou	47	8.35	6.06,10.64	332	13.86	12.48,15.25	379	12.81
Ha'erbin	67	11.9	9.22,14.58	384	16.03	14.56,17.50	451	15.25
Ji'nan	116	20.6	17.25,23.96	384	16.03	14.56,17.50	500	16.9
CAI
Yes	295	52.4	48.26,56.54	1146	47.85	45.85,49.85	1441	48.72
No	268	47.6	43.46,51.74	1249	52.15	50.15,54.15	1517	51.28
HIV
Yes	33	5.86	3.92,7.81	195	8.14	7.05,9.24	228	7.71
No	530	94.14	92.19,96.08	2200	91.86	90.76,92.95	2730	92.29
Syphilis
Yes	83	14.74	11.81,17.68	339	14.15	12.76,15.55	422	14.27
No	480	85.26	82.32,88.20	2056	85.85	84.45,87.24	2536	85.73