Table 3.
Modification of the effect of travel to Angola on malaria by gender in unadjusted and adjusted analyses
| No travel to Angola | Travel to Angola | ORs (95% CI) for travel within gender strata | |||
|---|---|---|---|---|---|
| N with/without malaria | OR (95% CI) | N with/without malaria | OR (95% CI) | ||
| Unadjusted ORa | |||||
| Female | 34/352 | 1.0 | 3/13 | 1.14 (0.88–1.47) | 1.14 (0.88–1.47) |
| Male | 46/266 | 1.10 (1.04–1.17) | 15/3 | 4.97 (1.59–15.52) | 4.50 (1.45–14.01) |
| Adjusted ORb | |||||
| Female | 34/352 | 1.0 | 3/13 | 1.65 (0.36–7.47) | 1.65 (0.36–7.47) |
| Male | 46/266 | 1.95 (1.25–3.04) | 15/3 | 85.00 (4.16–1736) | 43.58 (2.12–896) |
Measure of effect modification on additive scale: RERI (95% CI) 82.39 (−174 to 339); P = 0.53. Confidence intervals calculated using Delta approximation
Measure of effect modification on multiplicative scale: ratio of ORs (95% CI) 26.46 (0.92–766); P = 0.05
aGEE adjusted for health district (matching variable) and clustering of controls within households
bORs are adjusted for all covariates listed in Table 4