Table 3. Unadjusted odds ratios for occurrence of serum anti-DENV IgG antibodies according to demographic and environmental variables in individuals aged ≥15 years, Mayotte, 2006.
| Crude odds ratio | 95% Confidence interval | P | |
| Individual variables | |||
| Gender | |||
| Male | 0.94 | 0.70–1.27 | 0.71 |
| Female | 1.00 | ||
| Age, years | |||
| 15–24 | 1.00 | ||
| 25–34 | 2.15 | 1.27–3.66 | 0.005 |
| 35–44 | 2.33 | 1.40–3.90 | 0.002 |
| 45–54 | 2.65 | 1.22–5.74 | 0.015 |
| ≥55 | 1.66 | 0.85–3.24 | 0.136 |
| Birthplace | |||
| Mayotte | 1.00 | ||
| Comoros | 8.60 | 5.56–13.27 | <10−3 |
| Other | 1.76 | 0.55–5.53 | 0.33 |
| Duration of residence, years | |||
| <5 | 1.00 | ||
| 5–14 | 1.08 | 0.55–2.11 | 0.24 |
| Over 15 | 0.18 | 0.10–0.34 | <10−3 |
| Years of schooling | |||
| 0–6 | 1.00 | ||
| ≥6 | 0.42 | 0.26–0.66 | <10−3 |
| Household variables | |||
| Socioeconomic Asset index | |||
| Below the median | 1.00 | ||
| At or above the median | 0.47 | 0.32–0.70 | <10−3 |
| Household size (number of inhabitants) | |||
| 1–2 | 1.00 | ||
| 3–4 | 3.34 | 1.62–6.88 | 0.002 |
| ≥5 | 1.44 | 0.77–2.67 | 0.238 |
| House construction type | |||
| Makeshift | 1.00 | ||
| Adobe and stone | 0.57 | 0.29–1.11 | 0.10 |
| Concrete | 0.35 | 0.20–0.52 | <10−3 |