Table 3.
Estimated posterior odds ratios for prevalence of anaemia (Hb < 110g/L) for the effects of selected explanatory variables from final Bayesian hierarchical logistic regression model (n = 1,523).
| 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 to 1.462) | |
| >=16 years old | 0.688 | (0.218 to 1.547) | |
| Intensity of hookworm infection (Reference category: ‘Not Infected’) |
|||
| Lightly Infected | 0.895 | (0.645 to 1.208) | |
| Moderately Infected | 1.156 | (0.121 to 3.708) | |
| Heavily Infected | 1.165 | (0.132 to 3.861) | |
| Intensity of Schistosoma mansoni infection (Reference category: ‘Not Infected’) |
|||
| Lightly Infected | 0.825 | (0.360 to 1.442) | |
| Moderately Infected | 1.004 | (0.426 to 1.969) | |
| Heavily Infected | 2.292 | (1.070 to 4.258) a | |
| Intensity of Ascaris lumbricoides infection (Reference category: ‘Not Infected’) |
|||
| Lightly Infected | 1.060 | (0.680 to1.584) | |
| Moderately Infected | 1.057 | (0.582 to 1.748) | |
| Malaria spp infection (Reference category: ‘Not Infected’) | |||
| Infected | 1.136 | (0.821 to 1.540) | |
| Random part of the model | |||
| Level-2 (i.e. between schools) variance | 0.288 | (0.088 to 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.