Table 1 Chlamydia trachomatis prevalence according to various demographic and behavioural variables
From: Low prevalence of Chlamydia trachomatisinfection in asymptomatic young Swiss men
Characteristics | C. trachomatis negative | (%) | C. trachomatis positive | (%) | p-value* | Odds Ratio | 95% CI | Prevalence of C. trachomatis | Daly 95% CI |
|---|---|---|---|---|---|---|---|---|---|
Total | 511 | 98.8 | 6 | 1.2 | 1.2 | 0,4 – 2,5 | |||
Age (year ± SD) | 20.6 + 1.4 | 20.7 + 2.7 | |||||||
≤ 20 | 276 | 54 | 5 | 83.3 | 0.23 | ref | 1.8 | 0.6 – 4.2 | |
> 20 | 235 | 46 | 1 | 16.7 | 0.23 | 0,03 – 2,02 | 0.4 | 0 – 2.4 | |
Nationality at birth | |||||||||
Switzerland | 433 | 84.7 | 2 | 33.3 | 0.003 | ref | 0.5 | 0.1 – 1.7 | |
Europe | 41 | 8 | 1 | 16.7 | 5.3 | 0,47 – 59,5 | 2.4 | 0.1 – 13.3 | |
Other | 37 | 7.2 | 3 | 50 | 17.6 | 2,84 – 108 | 7.5 | 1.5 – 21.9 | |
Place of residence | |||||||||
> 10'000 inhabitants | 134 | 26.2 | 4 | 66.7 | 0.046 | ref | 2.9 | 0.8 – 7.4 | |
< 10'000 inhabitants | 377 | 73.8 | 2 | 33.3 | 0.17 | 0.03 – 0.98 | 0.5 | 0.1 – 1.9 | |
Main occupation | |||||||||
Work | 265 | 51.9 | 4 | 66.7 | 0.74 | ref | 1.5 | 0.4 – 3.8 | |
Studies | 231 | 45.2 | 2 | 33.3 | 0.53 | 0,1 – 2,69 | 0.9 | 0.1 – 3.1 | |
Declined to respond | 15 | 2.9 | 0 | 0 | - | - | 0 | 0 – 20 | |
Monthly income | |||||||||
< 1000 Frs. | 301 | 58.9 | 1 | 16.7 | 0.064 | ref | 0.3 | 0 – 1.8 | |
1000 – 2000 Frs. | 69 | 13.5 | 1 | 16.7 | 4.4 | 0,3 – 70,6 | 1.4 | 0 – 8 | |
> 2000 Frs. | 112 | 21.9 | 4 | 66.7 | 10.8 | 1,2 – 97,2 | 3.5 | 0.9 – 8.8 | |
Declined to respond | 29 | 5.7 | 0 | 0 | - | - | 0 | 0 – 10,3 | |
Number of lifetime sexual partner | |||||||||
0 | 67 | 13.1 | 0 | 0 | 0.26 | - | - | 0 | 0 – 4.5 |
1 | 125 | 24.5 | 0 | 0 | - | - | 0 | 0 – 2,4 | |
≥ 2 | 306 | 59.9 | 6 | 100 | - | - | 1.9 | 0.7 – 4.2 | |
Declined to respond | 13 | 2.5 | 0 | 0 | - | - | 0 | 0 – 23 | |
Sexual orientation | |||||||||
heterosexual | 386 | 75.5 | 4 | 66.7 | 0.66 | ref | 1 | 0.3 – 2.6 | |
homo/bisexual | 9 | 1.8 | 0 | 0 | - | - | 0 | 0 – 33,3 | |
Declined to respond | 116 | 22.7 | 2 | 33.3 | 1.7 | 0,3 – 9,2 | 1.7 | 0.2 – 6.1 | |
Condom use | |||||||||
Always | 165 | 32.3 | 2 | 33.3 | 1 | ref | 1.2 | 0.1 – 4.3 | |
Sometimes | 238 | 46.6 | 3 | 50 | 1.04 | 0,17 – 6,29 | 1.2 | 0.3 – 3.6 | |
Never | 74 | 14.5 | 1 | 16.7 | 1.11 | 0,10 – 12,5 | 1.3 | 0 – 7.4 | |
Declined to respond | 34 | 6.7 | 0 | 0 | - | - | 0 | 0 – 8.8 |