Table 3.
Odds ratios for C. trachomatis infection in multivariable logistic regression models
| Characteristic |
Girls |
Boys |
Both |
||||||
|---|---|---|---|---|---|---|---|---|---|
| OR | 95%CI | p1 | OR | 95%CI | p1 | OR | 95%CI | p1 | |
|
Family and culture |
|
|
|
|
|
|
|
|
|
| Residence in school year |
|
|
|
|
|
|
|
|
|
| At home |
- |
|
|
- |
|
|
1.00 |
|
0.013 |
| Other2 |
- |
|
|
- |
|
|
2.04 |
1.17–3.57 |
|
| Mother’s education |
|
|
|
|
|
|
|
|
|
| ≤High school/don’t know |
1.00 |
|
0.021 |
- |
|
|
- |
|
|
| ≥College |
2.22 |
1.13–4.37 |
|
- |
|
|
- |
|
|
|
Sexual behaviour |
|
|
|
|
|
|
|
|
|
| Condom use first intercourse |
|
|
|
|
|
|
|
|
|
| No |
- |
|
|
1.00 |
|
0.005 |
- |
|
|
| Yes |
- |
|
|
0.06 |
0.01–0.42 |
|
- |
|
|
| Sex partners past 6 months |
|
|
|
|
|
|
|
|
|
| 0-1 |
1.00 |
|
<0.001 |
- |
|
|
1.00 |
|
<0.001 |
| ≥ 2 |
3.59 |
1.76–7.32 |
|
- |
|
|
2.88 |
1.60–5.18 |
|
|
Last sexual partner |
|
|
|
|
|
|
|
|
|
| Age difference |
|
|
|
|
|
|
|
|
|
| Same age or younger |
- |
|
|
1.00 |
|
0.017 |
- |
|
|
| Older (≥1 year) |
- |
|
|
3.74 |
1.27–11.01 |
|
- |
|
|
| How met last partner |
|
|
|
|
|
|
|
|
|
| At school/work |
1.00 |
|
0.038 |
|
|
|
1.00 |
|
0.026 |
| Through family/friends/other |
1.90 |
0.42–8.65 |
|
- |
|
|
1.61 |
0.54–4.82 |
|
| On the Internet |
3.40 |
0.62–18.78 |
|
- |
|
|
2.81 |
0.78–0.08 |
|
| At a private party, bar, disco |
4.99 |
1.10–22.69 |
|
- |
|
|
3.54 |
1.18–10.61 |
|
|
Last sexual intercourse |
|
|
|
|
|
|
|
|
|
| Condom use |
|
|
|
|
|
|
|
|
|
| No |
- |
|
|
- |
|
|
1.00 |
|
0.015 |
| Yes | - | - | 0.23 | 0.07–0.75 | |||||
OR odds ratio, CI confidence interval, 1p-value for equality between categories; 2Living with relatives, in students’ houses or private accommodation.
The multivariable models include the significant variables from backwards stepwise procedure. Age and gender (if applicable) included in all models.