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Table 2 Socio-demographics, risk characteristics, and sexually transmitted infections of Japanese MSM recruited through the Internet

From: Substance use and sexual behaviours of Japanese men who have sex with men: A nationwide internet survey conducted in Japan

   Overall n = 2062 Never users n = 712 Lifetime reported single substance user n = 945 Lifetime reported multiple substance user n = 405
   % % % P value % P value
Age group 14–19 7.8 11.5 6.1 .000 5.5 .000
  20–29 51.4 52.0 53.2   48.3  
  30–39 30.6 24.3 32.8   37.8  
  40+ 9.5 12.2 8   8.5  
Education level No University degree 40.2 36.5 40.5 .103 45.9 .002
  University degree 59.8 63.5 59.5   54.1  
Sexual orientation Gay 70.5 62.8 75.2 .000 73.1 .002
  Bisexual 20.8 25.7 18.2   18  
  Other 8.7 11.5 6.6   8.9  
Currently have a casual sex partner No 70.0 78.7 69.9 .000 54.8 .000
  Yes 30.0 21.3 30.1   45.2  
Depression1 Low 81.7 84.3 83.4 .638 73.3 .000
  High 18.3 15.7 16.6   26.7  
HIV status Negative 97.2 99.3 97.7 .010 92.6 .000
  Positive 2.8 0.7 2.3   7.4  
Syphilis No 92.3 98.5 92.0 .000 82.2 .000
  Yes 7.7 1.5 8.0   17.8  
Hepatitis A No 98.7 99.2 99.2 1.00 97.0 .011
  Yes 1.3 0.8 0.8   3.0  
Hepatitis B No 95.1 98.6 95.0 .000 89.1 .000
  Yes 4.9 1.4 5.0   10.9  
UAI in the previous 6 month No anal intercourse 56.6 18.8 7.1 .000 4.7 .000
  Protected 21.3 49.4 44.3   38.3  
  Unprotected 22.1 31.7 48.6   57.0  
Number of sexual partners in the previous 6 months 0 18.9 26.7 15.7 .000 12.6 .000
  1 23.0 30.1 20.1   17.3  
  2–3 23.7 24.0 24.9   20.5  
  4–5 14.7 9.8 17.6   16.5  
  6+ 19.7 9.4 21.8   33.1  
Sex club in the previous 6 months No 52.0 69.0 46.2 .000 35.8 .000
  Yes 48.0 31.0 53.8   64.2  
Gay venue in the previous 6 months No 39.6 54.1 34.2 .000 26.7 .000
  Yes 60.4 45.9 65.8   73.3  
Tested for HIV within the past year No 76.3 85.5 74.1 .000 65.4 .000
  Yes 23.7 14.5 25.9   34.6  
HIV/STI knowledge score 0–4 53.7 61.8 51.6 .000 44.2 .000
  Full score 46.3 38.2 48.4   55.8  
  1. 1 Dichotomous categories based on Kawano, Suematsu & Shinzato (1990)