Table 3.
Logistic regressions (using Firth Method) examining relationship between schistosome species and odds of elevated USG1,2 among Tanzanian women
| Independent variables | Model 1 1 Elevated USG OR (95% CI) |
Model 2 1 Elevated USG OR (95% CI) |
Model 3 1 Elevated USG OR (95% CI) |
|---|---|---|---|
| Infection Status | |||
| No infection | 1 | 1 | 1 |
| S. haematobium | 3.07* (1.02 – 9.21) | 8.01* (1.32 – 48.8) | 7.76* (1.21 – 49.5) |
| S. mansoni | 1.59 (0.47 – 5.36) | 1.29 (0.37 – 4.46) | 1.38 (0.40 – 4.82) |
| Age (years) | 0.99 (0.95 – 1.03) | ||
| Education (years) | 1.04 (0.92 – 1.16) | ||
| Past treatment of Schistosomiasis | 1.18 (0.56 – 2.48) | ||
| Intensive breastfeeding3 | 1.16 (0.52 – 2.57) | ||
| Temperature C | 1.07 (0.83 – 1.37) | ||
| Village fixed effects4 | no | yes | yes |
| Observations5 | 204 | 204 | 203 |
| AIC | 243.4 | 246.3 | 233.0 |
Robust standard errors and 95% confidence intervals in parentheses
**
p<0.01,
*
p<0.05,
+
p<0.1
1
Elevated USG >1.020 g/ml.
2
Models include constants, but not displayed.
3
Currently breastfeeding without resumption of menstrual cycle.
4
Village fixed effects (n – 1 =10).
5
Observations vary due to 1 missing value for covariates.