Factors associated with unprotected anal intercourse and age among men who have sex with men who are gay bar customers in Osaka, Japan
Jane Koerner A B E , Satoshi Shiono A , Seiichi Ichikawa A , Noriyo Kaneko A , Hiroyuki Tsuji C , Toshio Machi C , Daisuke Goto C and Tetsuro Onitsuka C DA Department of Communicable Disease Epidemiology and Control, School of Nursing, Nagoya City University, 1 Kawasumi Mizuho-cho, Mizuho-ku, Nagoya, Aichi 467-8601, Japan.
B Department of Social Gerontology, School of Public Health, University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033 Japan.
C MASH Osaka, Tatsumi Building 4th Floor, Doyama-cho 17-5, Kita-ku, Osaka 520-0027 Japan.
D Faculty of Cultural Studies, Kyoto Sangyo University, Motoyama Kamigamo Kita-ku, Kyoto 603-8555, Japan.
E Corresponding author. Email: koerner-tky@umin.ac.jp
Sexual Health 9(4) 328-333 https://doi.org/10.1071/SH11081
Submitted: 26 May 2011 Accepted: 29 November 2011 Published: 23 February 2012
Abstract
Background: HIV infections among men who have sex with men (MSM) are increasing in Japan. Method: An anonymous self-administered questionnaire among clients of a gay bar in Osaka was used to analyse the relationship between age and unprotected anal sex (UAI). Results: The highest rate of UAI was reported among those aged ≥45 (73.3%), followed by the ≤24 (60.7%), 25–34 (56.3%) and 35–44 (54.0%) age groups (P = 0.01). In multivariate analysis, UAI was related to sex with six or more sexual partners among those aged ≤24 (adjusted odds ratio (AOR), 4.88; confidence interval (CI), 1.21–19.74), bisexual identity (AOR, 2.47; CI, 1.06–5.76) and drug use (AOR, 0.49; CI, 0.26–0.93 for no drug use) in the 25–34 age group, and no lifetime HIV testing in the 35–44 age group (AOR, 2.57; CI, 1.40–4.74). Condom purchasing and condom carrying were protective of UAI in 25–34, 35–44 and ≥45 age groups. Conclusion: Programs promoting condom use are needed for younger and older MSM.
Additional keywords: condom use, drug use, HIV/AIDS, testing.
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