Table 2.
The prevalence of parasite infection and period prevalence of clinical cases for all study villages in 2018 (n = 50)
| Outcome | Intervention | Control | Odds ratioa (95% confidence interval) |
|---|---|---|---|
| Infection prevalence | |||
| All clustersb | 0.8% (16/1924) | 1.1% (20/1814) | 0.71 (0.27, 1.84) p = 0.48 |
| North bank | 0.3% (4/1246) | 0.1% (1/1134) | 3.58 (0.4, 32.1) p = 0.255 |
| South banka | 1.8% (12/665) | 2.8% (19/669) | 0.61 (0.29, 1.26) p = 0.182 |
| By age | |||
| Under 5 years | 0.4% (1/237) | 3.5 (7/199) | 0.11 (0.01, 0.94), p = 0.043 |
| 5–14 years | 0.5% (4/783) | 0.7% (5/769) | 0.84 (0.22, 3.17), p = 0.8 |
| 15–30 years | 1.9% (6/323) | 0.7% (2/279) | 2.76 (0.55, 13.9), p = 0.219 |
| Above 30 years | 0.9% (5/567) | 1.1% (6/555) | 0.88 (0.26, 2.91), p = 0.83 |
| Period prevalence of clinical malaria | |||
| All clusters | 0.8% (71/8645) | 0.8% (85/10330) | 1.04 (0.57, 1.91) p = 0.893 |
| North bank | 0.2% (6/3752) | 0.2% (13/6064) | 0.77 (0.23, 2.54) p = 0.664 |
| South bank | 1.3% (65/4893) | 1.7% (72/4266) | 0.81 (0.34, 1.92) p = 0.613 |
aRandom effects logistic regression models are not valid with a small number of clusters per arm so a t test on cluster level summaries was used; in these cases, a risk ratio is presented instead of an odds ratio
bAdjusted for age