Potential risk factors | Chlamydia N = 101 | Â | gonorrhoea N = 35 | Â | HIV N = 42 | Â |
---|---|---|---|---|---|---|
 | Adjusted PR [95% CI] | p for trend | Adjusted PR [95% CI] | p for trend | Adjusted PR [95% CI] | p for trend |
age groups (years) | Â | 0.002 | Â | 0.255 | Â | 0.932 |
16-25 | ref. group | Â | ref. group | Â | ref. group | Â |
26-35 | 0.6 [0.4-1.1] | Â | 0.5 [0.2-1.6] | Â | 1.4 [0.6-3.2] | Â |
36-45 | 0.4 [0.2-0.9] | Â | 0.7 [0.2-2.3] | Â | 0.8 [0.3-2.1] | Â |
≥ 46 | 0.3 [0.1-0.7] |  | 0.6 [0.1-2.2] |  | 1.5 [0.6-3.8] |  |
residing in Oslo or Akershus county | Â | Â | Â | Â | Â | Â |
no | ref. group | Â | ref. group | Â | ref. group | Â |
yes | 1.4 [1.0-2.1] | Â | 1.9 [0.9-4.1] | Â | 2.3 [1.2-4.6] | Â |
ethnic background: | Â | Â | Â | Â | Â | Â |
Norwegian | ref. group | Â | ref. group | Â | ref. group | Â |
immigrant with western background | 0.3 [0.0-1.8] | Â | 1.5 [0.4-6.1] | Â | 0.4 [0.0-3.0] | Â |
immigrant with non-western background | 2.8 [1.4-5.7] | Â | 1.8 [0.5-6.1] | Â | 5.4 [1.9-15.3] | Â |
unknown | not included | Â | 5.9 [1.3-26.3] | Â | not included | Â |
education | Â | 0.568 | Â | 0.987 | Â | not |
primary school or less | ref. group | Â | ref. group | Â | merged with ref. group | calculated |
secondary school | 0.6 [0.3-1.2] | Â | 1.7 [0.2-16.1] | Â | ref. group | Â |
high school/university | 0.5 [0.3-1.1] | Â | 1.6 [0.1-16.5] | Â | 0.8 [0.5-1.5] | Â |
annual income before tax in 1000 NOK* in 2005 | Â | 0.204 | Â | 0.380 | Â | 0.102 |
< 150 | ref. group | Â | ref. group | Â | ref. group | Â |
150-299 | 1.1 [0.6-1.9] | Â | 1.0 [0.4-2.5] | Â | 1.0 [0.4-2.7] | Â |
300-500 | 1.2 [0.6-2.1] | Â | 0.1 [0.0-0.6] | Â | 0.8 [0.3-1.9] | Â |
> 500 | 1.3 [0.6-2.9] | Â | 1.0 [0.3-2.9] | Â | 1.5 [0.6-4.3] | Â |
unknown | not included | Â | not included | Â | 10.4 [1.5-71.4] | Â |
N of male sexual partners in life: | Â | < 0.001 | Â | 0.056 | Â | < 0.001 |
1-10 | ref. group | Â | ref. group | Â | ref. group | Â |
11-50 | 4.0 [1.8-8.8] | Â | 2.4 [0.7-7.6] | Â | 3.0 [0.7-13.2] | Â |
51- > 500 | 4.4 [1.9-10.3] | Â | 4.5 [1.3-15.6] | Â | 13.9 [3.5-55.8] | Â |
N of male sexual partners in the past 6 months | Â | 0.308 | Â | 0.065 | Â | 0.544 |
0-2 | ref. group | Â | ref. group | Â | ref. group | Â |
3-5 | 1.2 [0.6-2.2] | Â | 1.7 [0.6-4.9] | Â | 0.6 [0.2-1.8] | Â |
6-10 | 1.2 [0.7-2.3] | Â | 3.1 [1.1-8.8] | Â | 0.4 [0.1-1.5] | Â |
> 10 | 1.6 [0.8-3.2] | Â | 3.4 [1.0-11.3] | Â | 0.7 [0.2-2.3] | Â |
practice of threesome or group sex | Â | Â | Â | Â | Â | Â |
no | ref. group | Â | ref. group | Â | ref. group | Â |
yes | 1.5 [1.0-2.3] | Â | 0.8 [0.4-1.7] | Â | 1.0 [0.5-2.1] | Â |
received money for sex in the last year | Â | Â | Â | Â | Â | Â |
no | ref. group | Â | ref. group | Â | ref. group | Â |
yes | 0.9 [0.3-2.2] | Â | 2.3 [0.7-8.4] | Â | 1.9 [0.4-8.3] | Â |
paid for sex in the last year | Â | Â | Â | Â | Â | Â |
no | ref. group | Â | ref. group | Â | ref. group | Â |
yes | 1.6 [0.8-3.2] | Â | 1.2 [0.3-3.9] | Â | 0.6 [0.1-2.2] | Â |
unknown | not included | Â | 5.5 [0.4-82.7] | Â | not included | Â |
how many times feeling drunk in a given month | Â | 0.409 | Â | 0.283 | Â | < 0.001 |
< 1 | ref. group | Â | ref. group | Â | ref. group | Â |
1 | 1.6 [0.7-4.0] | Â | 3.9 [0.9-16.8] | Â | 1.1 [0.4-2.7] | Â |
2-3 | 2.0 [0.9-4.5] | Â | 3.3 [0.8-12.9] | Â | 0.6 [0.2-1.3] | Â |
≥ 4 | 1.6 [0.7-3.5] |  | 1.3 [0.3-5.0] |  | 0.1 [0.0-0.3] |  |
unsafe sex under the influence of alcohol in the past 12 months | Â | Â | Â | Â | Â | Â |
no | ref. group | Â | ref. group | Â | ref. group | Â |
yes | 1.8 [1.1-2.9] | Â | 1.9 [0.9-4.3] | Â | 1.5 [0.7-3.4] | Â |
under the influence of selected drugs** during sex in the past 12 months | Â | Â | Â | Â | Â | Â |
no | ref. group | Â | ref. group | Â | ref. group | Â |
yes | 0.8 [0.5-1.5] | Â | 1.7 [0.8-3.9] | Â | 5.2 [2.7-11.4] | Â |
ever had a date in reality with Internet partner | Â | Â | Â | Â | Â | Â |
no | ref. group | Â | not included | Â | ref. group | Â |
yes | 1.6 [0.5-5.0] | Â | Â | Â | 1.4 [0.4-4.6] | Â |
UAI*** with a casual or anonymous partner in the last 6 months | Â | Â | Â | Â | Â | Â |
no | ref. group | Â | ref. group | Â | ref. group | Â |
yes | 1.5 [0.9-2.4] | Â | 1.0 [0.5-2.2] | Â | 2.0 [0.9-4.6] | Â |