Table 1.
Self-reported details of responders' characteristics
| Variable | n (%) responders* |
| Age | |
| Under 21 years | 30 (7.5) |
| 21 – 30 years | 144 (35.8) |
| 31 – 45 years | 179 (44.5) |
| 46 – 60 years | 31 (7.8) |
| Older 61 years | 11 (2.7) |
| Nationality | |
| Swiss | 310 (77.1) |
| Other Europe | 63 (15.7) |
| Asia | 7 (1.7) |
| Central/South America | 14 (3.5) |
| Other | 3 (0.7) |
| Sexual orientation | |
| Homosexual | 241 (60.0) |
| Heterosexual | 106 (26.4) |
| Bisexual | 54 (13.4) |
| Sexual contacts with ... | |
| Men only | 131 (32.6) |
| Women only | 36 (9.0) |
| Both men and women | 37 (9.2) |
| Relationship | |
| Living in a monogamous relationship | 124 (30.8) |
| Living in an open relationship with arrangements | 78 (19.4) |
| Living in an open relationship without arrangements | 19 (4.7) |
| Living alone | 150 (37.3) |
| Result of last HIV test | |
| Negative serostatus | 309 (76.9) |
| Positive serostatus | 2 (0.5) |
| Never been tested | 78 (19.4) |
| Hepatitis A vaccination status | |
| Not vaccinated | 92 (22.9) |
| Vaccinated | 183 (45.5) |
| Vaccination status unknown | 112 (27.9) |
| Hepatitis B vaccination status | |
| Not vaccinated | 84 (20.9) |
| Vaccinated | 199 (49.5) |
| Vaccination status unknown | 102 (25.4) |
| Number of past tests for sexually transmitted infections (STI) | |
| 0 | 89 (22.1) |
| 1–2 | 138 (34.3) |
| 3 and more | 141 (35.1) |
| History of sexually transmitted infections (STI) | |
| No | 277 (68.9) |
| Yes | 115 (28.6) |
*n varies per item due to item-non-response. % = relative to the entire sample (n = 402)