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