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Table 3 Multivariate analysis of substance use 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

   Lifetime reported single substance user (n = 945) Lifetime reported multiple sbstance user (n = 405)
   AOR 95% C.I. P-value AOR 95% C.I. P-value
Age group 14–19 1    1   
  20–29 1.60 1.07–2.40 .023 1.53 0.85–2.77 .160
  30–39 2.12 1.38–3.25 .001 2.62 1.41–4.86 .002
  40+ 1.02 0.62–1.67 .944 1.16 0.57–2.38 .679
Education level No University degree 1    1   
  University degree 0.74 0.56–0.94 .012 0.66 0.48–0.89 .007
Sexual orientation Gay 1    1   
  Bisexual 0.81 0.62–1.06 .120 1.00 0.68–1.46 .985
  Other 0.62 0.42–0.92 .016 1.19 0.72–1.98 .502
Currently have a casual sex partner No 1    1   
  Yes 1.24 0.96–1.60 .104 2.57 1.84–3.59 .000
Depression No 1    1   
  Yes 1.12 0.84–1.50 .447 2.27 1.58–3.27 .000
HIV status Negative 1    1   
  Positive 2.91 0.92–9.21 .070 7.78 2.33–25.93 .001
UAI in the previous 6 months No anal intercourse 1    1   
  Protected 1.57 0.95–2.58 .078 1.20 0.56–2.56 .634
  Unprotected 2.53 1.53–4.17 .000 2.42 1.14–5.16 .022
Number of sex partners in the previous 6 months 0 1    1   
  1 0.82 0.54–1.25 .360 1.08 0.59–1.98 .804
  2–3 1.04 0.68–1.58 .864 1.06 0.59–1.92 .838
  4–5 1.44 0.90–2.29 .127 1.22 0.65–2.30 .543
  6+ 1.67 1.05–2.67 .031 2.13 1.15–3.95 .016
Sex club in the previous 6 months No 1.00    1   
  Yes 1.64 1.29–2.09 .000 2.00 1.44–2.80 .000
Gay venue in the previous 6 months No 1.00    1   
  Yes 1.65 1.32–2.01 .000 2.56 1.78–3.39 .000
Tested for HIV within the past year No 1    1   
  Yes 1.42 1.08–1.88 .013 1.78 1.25–2.54 .001
HIV/STI knowledge score 0–4 1    1   
  5(full score) 1.22 0.98–1.52 .081 1.59 1.18–2.16 .003
  1. OR, odds ratio; CI, confidence interval