Table 3.
Estimated posterior odds ratios for prevalence of anaemia (Hb < 110 g/L) for the effects of selected explanatory variables from final Bayesian hierarchical logistic regression model (n = 1523)
| Variable | Odds ratio | 95% credible interval |
|---|---|---|
| Fixed part of the model | ||
| Main effects | ||
| Sex (Reference category: ‘Male’) | ||
| Female | 1.073 | (0.787 to 1.405) |
| Age (Reference category: ‘ > =10–12 years old’) | ||
| 13–15 years old | 1.095 | (0.804–1.462) |
| > = 16 years old | 0.688 | (0.218–1.547) |
| Intensity of hookworm infection (Reference category: ‘Not Infected’) | ||
| Lightly infected | 0.895 | (0.645–1.208) |
| Moderately infected | 1.156 | (0.121–3.708) |
| Heavily infected | 1.165 | (0.132–3.861) |
| Intensity of Schistosoma mansoni infection (Reference category: ‘Not Infected’) | ||
| Lightly infected | 0.825 | (0.360–1.442) |
| Moderately infected | 1.004 | (0.426–1.969) |
| Heavily infected | 2.292 | (1.070–4.258)a |
| Intensity of Ascaris lumbricoides infection (Reference category: ‘Not Infected’) | ||
| Lightly infected | 1.060 | (0.680–1.584) |
| Moderately infected | 1.057 | (0.582–1.748) |
| Malaria spp infection (Reference category: ‘Not Infected’) infected | 1.136 | (0.821–1.540) |
| Random part of the model | ||
| Level-2 (i.e. between schools) variance | 0.288 | (0.088–0.630) |
a
This is a significant odds ratio of heavily infected children with S. mansoni compared with uninfected children in the same sense as denoted in Table 2.