title: [Analysis on factors associated with taking subsequent confirmation test among men who have sex with men after being tested positive in oral fluid HIV antibody test in Beijing].
abstract: OBJECTIVE
  To analyze the proportion and associated factors of taking subsequent confirmation test among men who have sex with men (MSM) after being tested positive in oral fluid HIV antibody test.
  
  
  METHODS
  By using successive sampling, 1 003 MSM, who were tested positive in oral fluid HIV antibody test in China-Bill & Melinda Gates Foundation AIDS prevention Program (Extension program) in Beijing during May 1 to December 31, 2013, were recruited. The inclusion criteria included: the objects were men who reported having sex with men; the objects aged more than 18 years old; the objects were tested positive in oral fluid HIV antibody test; the objects had not been reported as HIV positives in China Information System for Disease Control and Prevention previously. According to the program strategy, MSM grassroots organizations transferred the respondents to seek subsequent confirmation tests in specific Center for Disease Control and Prevention (CDCs) or hospitals. The subsequent confirmation tests included: fingertip blood HIV antibody rapid test, venous blood Enzyme Linked Immunosorbent Assay (ELISA) HIV antibody test and venous blood Western Blot (WB) HIV antibody test. Chi-square test was adopted to compare the proportion of taking subsequent confirmation tests in different groups. Nonconditional multivaritae binarylogistic regression analysis was taken to identify the associated factors with whether taking subsequent confirmation tests and to calculate the OR (95% CI) values.
  
  
  RESULTS
  The 1 003 respondents were (30.9 ± 9.1) years old. Among all objects, 87.8% (881/1 003) of them took fingertip blood HIV antibody rapid tests and the positive rate was 85.4% (752/881). 98.0% (737/752) of those who were identified as positive in fingertip blood HIV rapid tests took ELISA and WB tests, and the positive rate was 94.4% (696/737). Comparing with those who were expected to seek subsequent confirmation tests in CDCs, the OR (95% CI) value of those who were expected to seek tests in hospitals was 5.10 (1.69-15.36). The OR (95% CI) values of those who used condom sometimes and those who never used condom in anal sex were 5.81 (2.14-15.77) and 3.45 (2.00-5.97) respectively, in comparison with those who reported not having anal sex or using condom consistently in anal sex during the past 6 months. Comparing with the respondents recruited from the internet, the OR (95% CI) values of those recruited in bathrooms, parks/toilets and bars were 0.17 (0.05-0.53), 0.10 (0.04-0.29) and 0.22 (0.06-0.79) respectively. The likelihood of taking subsequent confirmation test decreased with the increase of number of male sexual partners in the past 3 months, and the OR (95% CI) value was 0.92 (0.86-0.99).
  
  
  CONCLUSIONS
  The potential HIV positive MSM in the bathroom, park/toilet and bars are less likely to take subsequent confirmation test. Those who do not use condom consistently during anal sex are more likely to seek subsequent confirmation test. Medical organization conducting subsequent confirmation tests is more likely to increase the confirmation test rate of potential HIV positive MSM. The number of male sexual partners has negative correlation with whether to accept the subsequent confirmation test.
authors.affiliation: Department of HIV/STDs Prevention and Control, Beijing Center for Disease Prevention and Control, Beijing 100013, China.
authors.forename: Dongyan
authors.initials: D
authors.lastname: Xia
authors.forename: Guowu
authors.initials: G
authors.lastname: Liu
authors.forename: Ji
authors.initials: J
authors.lastname: Zeng
authors.forename: Yang
authors.initials: Y
authors.lastname: Li
authors.forename: Xueli
authors.initials: X
authors.lastname: Su
authors.forename: Weidong
authors.initials: W
authors.lastname: Sun
authors.forename: Jia
authors.initials: J
authors.lastname: Li
authors.forename: Qin
authors.initials: Q
authors.lastname: Zhang
authors.forename: Mingqiang
authors.initials: M
authors.lastname: Hao
authors.forename: Jingrong
authors.initials: J
authors.lastname: Ye
authors.forename: Ruolei
authors.initials: R
authors.lastname: Xin
authors.forename: Yuejuan
authors.initials: Y
authors.lastname: Zhao
authors.forename: Juan
authors.initials: J
authors.lastname: Wang
authors.forename: Hongyan
authors.initials: H
authors.lastname: Lu
mesh_terms: D000068476:Beijing; D017280:Condoms; D015483:HIV Antibodies / Q000032:analysis; D006679:HIV Seropositivity / Q000175:diagnosis*; D018451:Homosexuality, Male; D006801:Humans; D008297:Male; D008403:Mass Screening; D010342:Patient Acceptance of Health Care; D012309:Risk-Taking; D012725:Sexual Behavior; D012747:Sexual Partners; D011795:Surveys and Questionnaires
chemical_list: D015483:HIV Antibodies