Table 1.
Sosio-demographic characteristics, prevalence and crude odds ratios for C. trachomatis infection in univariable logistic regression analysis
| Characteristic |
Girls |
Boys |
Both |
||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| N | (%) | nCT | (%) | OR | 95%CI | p1 | N | (%) | nCT | (%) | OR | 95%CI | p1 | OR | 95%CI | p1 | |
|
Total |
565 |
(100.0) |
41 |
(7.3) |
|
|
|
466 |
(100.0) |
18 |
(3.9) |
|
|
|
|
|
|
|
Age |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| 16 |
168 |
(29.7) |
11 |
(6.5) |
1.00 |
|
0.48 |
139 |
(29.8) |
3 |
(2.2) |
1.00 |
|
0.38 |
1.00 |
|
0.21 |
| 17 |
177 |
(31.3) |
15 |
(8.5) |
1.32 |
0.59 to 2.97 |
|
179 |
(38.4) |
9 |
(5.0) |
2.40 |
0.64 to 9.04 |
|
1.51 |
0.76 to 3.00 |
|
| 18 |
166 |
(29.4) |
9 |
(5.4) |
0.82 |
0.33 to 2.03 |
|
106 |
(22.7) |
3 |
(2.8) |
1.32 |
0.26 to 6.68 |
|
0.97 |
0.44 to 2.13 |
|
| 19-20 |
48 |
(9.6) |
6 |
(11.1) |
1.78 |
0.63 to 5.08 |
|
39 |
(9.0) |
3 |
(7.1) |
3.49 |
0.68 to 17.97 |
|
2.17 |
0.91 to 5.17 |
|
|
Family and culture |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| Ethnicity |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| Norwegian |
402 |
(71.2) |
23 |
(5.7) |
1.00 |
|
0.093 |
325 |
(70.0) |
12 |
(3.7) |
1.00 |
|
0.73 |
1.00 |
|
0.21 |
| Sami/Sami-Norwegian |
124 |
(21.9) |
14 |
(11.3) |
2.10 |
1.04 to 4.21 |
|
105 |
(22.6) |
3 |
(2.9) |
0.74 |
0.21 to 2.77 |
|
1.59 |
0.87 to 2.89 |
|
| Other |
39 |
(6.9) |
4 |
(10.3) |
1.88 |
0.61 to 5.75 |
|
34 |
(7.3) |
2 |
(5.9) |
1.63 |
0.35 to 7.61 |
|
1.77 |
0.72 to 4.36 |
|
| Church affiliation2 |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| Yes |
448 |
(79.6) |
33 |
(7.4) |
1.00 |
|
0.88 |
294 |
(63.5) |
12 |
(4.1) |
1.00 |
|
0.54 |
1.00 |
|
0.36 |
| No |
115 |
(20.4) |
8 |
(7.0) |
0.94 |
0.42 to 2.10 |
|
169 |
(36.5) |
5 |
(3.0) |
0.72 |
0.25 to 2.07 |
|
0.74 |
0.40 to 1.40 |
|
| Residence in school year |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| At home |
356 |
(63.1) |
20 |
(5.6) |
1.00 |
|
0.051 |
287 |
(61.7) |
7 |
(2.4) |
1.00 |
|
0.084 |
1.00 |
|
0.011 |
| Other3 |
208 |
(36.9) |
21 |
(10.1) |
1.89 |
1.00 to 3.57 |
|
178 |
(38.3) |
10 |
(5.6) |
2.38 |
0.89 to 6.37 |
|
2.00 |
1.17 to 3.4 |
|
| Mother’s education |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| ≤ High school/don’t know |
313 |
(55.5) |
15 |
(4.8) |
1.00 |
|
0.013 |
304 |
(65.7) |
12 |
(3.9) |
1.00 |
|
0.66 |
1.00 |
|
0.03 |
| ≥ College |
251 |
(44.5) |
26 |
(10.4) |
2.30 |
1.19 to 4.44 |
|
159 |
(34.3) |
5 |
(3.1) |
0.79 |
0.27 to 2.28 |
|
1.79 |
1.05 to 3.04 |
|
|
High school |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| Study category |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| Academic |
347 |
(61.4) |
21 |
(6.1) |
1.00 |
|
0.17 |
171 |
(36.8) |
6 |
(3.5) |
1.00 |
|
0.90 |
1.00 |
|
0.56 |
| Vocational |
218 |
(38.6) |
20 |
(9.2) |
1.57 |
0.83 to 2.97 |
|
294 |
(63.2) |
11 |
(3.7) |
1.07 |
0.39 to 2.94 |
|
1.17 |
0.69 to 1.99 |
|
| Year |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| 1 |
210 |
(37.2) |
16 |
(7.6) |
1.00 |
|
0.68 |
178 |
(38.3) |
4 |
(2.2) |
1.00 |
|
0.44 |
1.00 |
|
0.83 |
| 2 |
198 |
(35.0) |
16 |
(8.1) |
1.07 |
0.52 to 2.19 |
|
209 |
(44.9) |
9 |
(4.3) |
1.96 |
0.59 to 6.47 |
|
1.20 |
0.66 to 2.21 |
|
| 3 |
157 |
(27.8) |
9 |
(5.7) |
0.74 |
0.32 to 1.72 |
|
78 |
(16.8) |
4 |
(5.1) |
2.35 |
0.57 to 9.65 |
|
1.08 |
0.53 to 2.21 |
|
|
Alcohol/drug use |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| Low |
134 |
(23.8) |
4 |
(3.0) |
1.00 |
|
0.098 |
130 |
(28.4) |
3 |
(2.3) |
1.00 |
|
0.087 |
1.00 |
|
0.034 |
| Medium |
322 |
(57.3) |
27 |
(8.4) |
2.98 |
1.02 to 8.67 |
|
198 |
(43.3) |
5 |
(2.5) |
1.10 |
0.26 to 4.67 |
|
2.41 |
1.05 to 5.53 |
|
| High | 106 | (18.9) | 10 | (9.4) | 3.39 | 1.03 to 11.12 | 129 | (28.2) | 9 | (7.0) | 3.18 | 0.84 to 12.01 | 3.23 | 1.33 to 7.83 | |||
nCT number of chlamydia cases, OR odds ratio, CI confidence interval, 1p-value for equality between categories; 2Affiliation to any denomination: Church of Norway (n = 722), Russian Orthodox Church (n = 9), Jehova’s Witnesses/Pentecostals (n = 7), Islam (n = 4); 3Living with relatives, in students’ houses or in private accommodation.