Table 1 Univariate analysis: characteristics of participants †
2007 | 2009 | P-value | Pooled data | ||||
|---|---|---|---|---|---|---|---|
N = 416 (%) | N = 231 (%) | N = 647 (%) | |||||
Serosorting | 0.412 | ||||||
Yes | 157 | (37.7) | 90 | (39.0) | 247 | (38.2) | |
No | 237 | (57.0) | 134 | (58.0) | 371 | (57.3) | |
No answer | 22 | (5.3) | 7 | (3.0) | 29 | (4.5) | |
Age | 0.200 | ||||||
< 25 yr. | 82 | (19.7) | 49 | (21.2) | 131 | (20.2) | |
25–49 yr. | 282 | (67.8) | 150 | (64.9) | 432 | (66.8) | |
≥ 50 yr. | 46 | (11.1) | 32 | (13.9) | 78 | (12.1) | |
No answer | 6 | (1.4) | 0 | - | 6 | (0.9) | |
Survey mode | 0.100 | ||||||
Paper | 149 | (35.8) | 68 | (29.4) | 217 | (33.5) | |
Internet | 267 | (64.2) | 163 | (70.6) | 430 | (66.5) | |
University degree | 0.574 | ||||||
Yes | 185 | (44.5) | 110 | (47.6) | 295 | (45.6) | |
No | 230 | (55.3) | 121 | (52.4) | 351 | (54.3) | |
No answer | 1 | (0.3) | 0 | - | 1 | (0.2) | |
Nationality | 0.001 | ||||||
Swiss national | 336 | (80.8) | 166 | (71.9) | 502 | (77.6) | |
Non Swiss national | 69 | (16.6) | 64 | (27.7) | 133 | (20.6) | |
No answer | 11 | (2.6) | 1 | (0.4) | 12 | (1.9) | |
Residence area > 100,000 inhabitants | 0.297 | ||||||
Yes | 174 | (41.8) | 86 | (37.2) | 260 | (40.2) | |
No | 241 | (57.9) | 143 | (61.9) | 384 | (59.4) | |
No answer | 1 | (0.2) | 2 | (0.9) | 3 | (0.5) | |
Gay organization | 0.602 | ||||||
Yes | 60 | (14.4) | 38 | (16.5) | 98 | (15.1) | |
No | 355 | (85.3) | 193 | (83.6) | 548 | (84.7) | |
No answer | 1 | (0.2) | 0 | - | 1 | (0.2) | |
Steady partner a | 0.038 | ||||||
Yes | 172 | (41.4) | 116 | (50.2) | 288 | (44.5) | |
No | 240 | (57.7) | 115 | (49.8) | 355 | (54.9) | |
No answer | 4 | (1.0) | 0 | - | 4 | (0.6) | |
Number of sexual partners with AI a | 0.219 | ||||||
None | 9 | (2.2) | 2 | (0.9) | 11 | (1.7) | |
1–5 partners | 200 | (48.1) | 102 | (44.2) | 302 | (46.7) | |
≥ 6 partners | 207 | (49.8) | 126 | (54.6) | 333 | (51.5) | |
No answer | 0 | - | 1 | (0.4) | 1 | (0.2) | |
Regularly frequenting sex-on-premises venues a | 0.659 | ||||||
Yes | 82 | (19.7) | 47 | (20.4) | 129 | (19.9) | |
No | 322 | (77.4) | 180 | (77.9) | 502 | (77.6) | |
No answer | 12 | (2.9) | 4 | (1.7) | 16 | (2.5) | |
Frequent use of the internet for sexual encounters a | 0.558 | ||||||
Yes | 178 | (42.8) | 109 | (47.2) | 287 | (44.4) | |
No | 232 | (55.8) | 119 | (51.5) | 351 | (54.3) | |
No answer | 6 | (1.4) | 3 | (1.3) | 9 | (1.4) | |
Sexually transmitted infections a | 0.003 | ||||||
Yes | 72 | (17.3) | 56 | (24.2) | 128 | (19.8) | |
No | 330 | (79.3) | 175 | (75.8) | 505 | (78.1) | |
No answer | 14 | (3.4) | 0 | - | 14 | (2.2) | |
UAI with partners of different or unknown HIV status a | 0.510 | ||||||
Yes | 295 | (70.9) | 155 | (67.1) | 450 | (69.6) | |
No | 118 | (28.4) | 75 | (32.5) | 193 | (29.8) | |
No answer | 3 | (0.7) | 1 | (0.4) | 4 | (0.6) | |
HIV test a | 0.087 | ||||||
Yes | 177 | (42.6) | 106 | (45.9) | 283 | (43.7) | |
No | 231 | (55.5) | 125 | (54.1) | 356 | (55.0) | |
No answer | 8 | (1.9) | 0 | - | 8 | (1.2) | |
HIV status declared | 0.021 | ||||||
Unknown | 94 | (22.6) | 62 | (26.8) | 156 | (24.1) | |
HIV negative | 256 | (61.5) | 117 | (50.7) | 373 | (57.7) | |
HIV positive/Aids | 66 | (15.9) | 52 | (22.5) | 118 | (18.2) | |
Frequent substance use while having sex a | 0.054 | ||||||
Yes | 119 | (28.6) | 83 | (35.9) | 202 | (31.2) | |
No | 297 | (71.4) | 148 | (64.1) | 445 | (68.8) | |