Table 2.
Prevalence and risk factors associated with Chlamydia trachomatis (CT) infection within the healthcare-based population of New Caledonia aged 18–49 years
| CT infection | |||||||||
|---|---|---|---|---|---|---|---|---|---|
| Univariate analysis |
Multivariate analysis |
||||||||
| Weighted and adjusted prevalence |
Crude | p Value | Adjusted | p Value | p Value | ||||
| Variables | n Crude | n Weighted | Per cent and (95% CI) |
OR | (95% CI) | OR | (95% CI) | c | |
| Total prevalence | 56 | 106 830 | 8.99 | (6.56 to 11.41) | |||||
| Sex | <0.0001* | <0.0001† | <00 001† c=0.853 | ||||||
| Male | 18 | 4763.0 | 7.92 | (4.26 to 11.58) | 1.00 (ref) | – | 1.00 (ref) | – | |
| Female | 38 | 5920.0 | 10.07 | (6.91 to 13.24) | 1.30 | 1.25 to 1.35) | 1.28 | (1.22 to 1.34) | |
| Age group (years) | <0.0001† | <0.0001* | |||||||
| 18–25 | 33 | 6202.0 | 18.71 | (12.40 to 25.02) | 56.50 | (46.58 to 68.54) | 52.13 | (42.88 to 63.37) | |
| 26–33 | 16 | 3299.0 | 10.57 | (5.36 to 15.78) | 29.02 | (23.89 to 35.25) | 26.24 | (21.56 to 31.95) | |
| 34–41 | 6 | 1077.0 | 3.78 | (0.60 to 6.95) | 9.64 | (7.89 to 11.78) | 9.89 | (8.08 to 12.11) | |
| 42–49 | 1 | 105.0 | 0.41 | (0.00 to 1.20) | 1.00 (ref) | – | 1.00 (ref) | – | |
| Province | <0.0001* | <0.0001† | |||||||
| Loyalty Islands | 5 | 531.0 | 7.34 | (0.92 to 13.75) | 0.88 | (0.81 to 0.97) | – | – | |
| North | 20 | 2783.0 | 12.62 | (7.24 to 18.00) | 1.61 | (1.54 to 1.69) | – | – | |
| South | 31 | 7369.0 | 8.23 | (5.35 to 11.11) | 1.00 (ref) | – | – | – | |
| Ethnicity‡ | <0.0001* | <0.0001† | |||||||
| Melanesian | 44 | 7937.0 | 17.54 | (12.51 to 22.56) | 5.69 | (5.4 to 5.96) | – | – | |
| Others | 11 | 2556.0 | 3.60 | (1.39 to 5.81) | 1.00 (ref) | – | – | – | |
| Ethnicity/Province | <0.0001† | ||||||||
| Melanesian/Loyalty Islands | 4 | 447.2 | – | – | – | – | 2.68 | (2.57 to 2.79) | |
| Melanesian/North | 19 | 2593.0 | – | – | – | – | 5.74 | (5.55 to 5.93) | |
| Melanesian/South | 21 | 4897.0 | – | – | – | – | 6.64 | (6.58 to 6.70) | |
| Others/Loyalty Islands | 1 | 84.8 | – | – | – | – | 5.70 | (5.48 to 5.95) | |
| Others/North | 0 | – | – | – | – | – | – | – | |
| Others/South | 10 | 2472.0 | – | – | – | – | 1.00 (ref) | – | |
| Marital status | <0.0001* | <0.0001† | |||||||
| Single | 35 | 6435.0 | 13.31 | (8.82 to 17.79) | 2.39 | (2.30 to 2.49) | 1.82 | (1.73 to 1.90) | |
| In couples | 21 | 4248.0 | 6.02 | (3.37 to 8.68) | 1.00 (ref) | – | 1.00 (ref) | – | |
| Study level | <0.0001ψ | <0.0001* | |||||||
| Without a diploma | 6 | 1179.0 | 7.76 | (1.45 to 14.07) | 0.94 | (0.88 to 1.00) | 1.28 | (1.18 to 1.38) | |
| Intermediate | 24 | 4055.0 | 10.79 | (6.34 to 15.25) | 1.35 | (1.29 to 1.41) | 1.08 | (1.02 to 1.13) | |
| Bachelor and higher study | 26 | 5449.0 | 8.24 | (5.00 to 11.48) | 1.00 (ref) | – | 1.00 (ref) | – | |
*Likelihood ratio test p<0.20.
†Likelihood ratio test p<0.05.
‡1 missing value for ethnicity among a participant with CT.