High prevalence of HIV infection and unprotected anal intercourse among older men who have sex with men in China: a systematic review and meta-analysis

Li, Yong-ze; Xu, Jun-jie; Qian, Han-zhu; You, Bing-xin; Zhang, Jing; Zhang, Jian-ming; Hu, Qing-hai; Chu, Zhen-xing; Liu, Shu-yang; Jiang, Yong-jun; Geng, Wen-qing; Shang, Hong

doi:10.1186/1471-2334-14-531

Table 1 Prevalence of HIV infection among older MSM in China

From: High prevalence of HIV infection and unprotected anal intercourse among older men who have sex with men in China: a systematic review and meta-analysis

First author, published year	Study design				Older MSM				Younger MSM
	Location	Study year	Sampling method	Recruitment settings	Sample size	HIV infection^a	Syphilis infection^b	UAI	Sample size	HIV infection	Syphilis infection	UAI
Ma AB, 2007	Yunnan	2005	Mixed^c	Medical settings	8	1	NR^d	NR	70	7	NR	NR
Xi SJ, 2011	Hangzhou	2009-2010	Snowballing	Multiple gay venues or events	16	1	NR	NR	514	44	NR	NR
Long QP, 2012	Hunan	2011	Mixed	Multiple gay venues or events	33	7	NR	27	233	36	NR	178
Zhou JB, 2012	Changzhou	2007	Snowballing	Multiple gay venues or events	43	12	18	NR	550	69	167	NR
Wang ZC, 2012	Xining	2011	Mixed	Medical settings	21	2	0	17	382	45	40	233
Qun He, 2006	Guangzhou	2003	Mixed	Medical settings	23	0	NR	NR	201	0	NR	NR
Xuan ZB, 2012	Shanghai	2010-2011	Snowballing	Medical settings	9	0	NR	7	89	3	NR	64
Chu ZX, 2011	Shenyang	2008	Snowballing	Medical settings	56	4	11	50	2018	96	234	1888
Yan Xiao, 2010	20 cities	2006	Snowballing	Multiple gay venues or events	1009	55	NR	834	2961	91	NR	2034
Wu ZY, 2013	61 Cities	2008- 2009	RDS^e	Medical settings	1182	90	274	813	45478	2196	5226	23294
Zhou YQ, 2012	Shanghai	2010- 2011	Mixed	Medical settings	6	1	2	NR	288	17	36	NR
Yang LG, 2012	Fuyang	2010-2011	Mixed	Multiple gay venues or events	2	0	NR	2	263	15	NR	163
Lan GH, 2009	Guangxi	2008	Snowballing	Medical settings	41	2	5	28	1105	18	60	613
Feng F, 2009	Haikou	2008	Mixed	Medical settings	4	0	NR	NR	100	2	NR	NR
Zhang FX, 2011	Suzhou	2008- 2009	Mixed	Medical settings	38	2	NR	27	616	56	NR	384
Li R, 2010	Dalian	2009	Snowballing	Multiple gay venues or events	6	2	NR	NR	396	16	NR	NR
Chen Y, 2013	Guizhou	2008- 2009	Mixed	Multiple gay venues or events	32	14	NR	27	798	179	NR	513
Ni ZM, 2011	Hangzhou	2009	Mixed	Multiple gay venues or events	5	1	1	NR	214	33	43	NR
Xu J, 2010	4 cities	2008	RDS	Medical settings	252	24	NR	214	1612	101	NR	1259
Zheng LX, 2012	Longyan	2010- 2011	Snowballing	Multiple gay venues or events	26	2	NR	NR	377	13	NR	NR

^aBlood specimens were detected by Enzyme-Linked Immuno Sorbent Assays (ELISA) and Western Blot assay (WB) to confirm HIV infection in all the included studies; ^bBlood specimens were detected by Rapid Plasma Reagin (RPR) and Treponema Pallidum Particle Agglutination assay (TPPA)to confirm syphilis infection in all the included studies; ^cMixed: Snowballing or/and RDS or/and convenience sampling were included; ^dNR: Not reported; ^eRDS: Respond Driven Sampling.

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ISSN: 1471-2334

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