Table 2.
Weighted prevalence of asymptomatic Plasmodium falciparum malaria in 12 random villages in northern Uganda, by season and location in a district where indoor residual insecticide spraying (IRS) was implemented or not
| Village | Visit year | Visit months | Season | Region | IRS district | Stratification variables | N enrolled | N with RDT data | Malaria prevalence (%) | Sum of weights for those enrolled (total = 2,829,988) | Sum of weights for those with RDT data (total = 2,763,690) | ||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Proximity to water | Rural/urban | Unweighted | Weighted | ||||||||||
| 63 | 2011 | 11 | Wet | North-central | 1 | Near | Rural | 85 | 72 | 16.5 | 20.1 (10.8, 29.4) | 123,080 | 105,213 |
| 75 | 2014 | 2 | Dry | North-central | 1 | Near | Urban | 88 | 88 | 17.0 | 17.6 (9.6, 25.7) | 939,218 | 939,218 |
| 19 | 2012 | 2, 3 | Dry | North-central | 1 | Far | Rural | 83 | 80 | 6.0 | 10.6 (0.7, 20.4) | 30,433 | 29,382 |
| 77 | 2013 | 4, 5 | Wet | North-central | 1 | Far | Urban | 82 | 79 | 28.0 | 34.2 (20.7, 47.7) | 34,195 | 33,039 |
| 29 | 2012 | 12 | Wet | Northwest | 0 | Near | Rural | 75 | 75 | 84.0 | 79.3 (67.4, 91.2) | 355,600 | 355,600 |
| 31 | 2012 | 3, 4 | Dry, wet | North-central | 0 | Near | Rural | 89 | 85 | 61.8 | 63.6 (48.5, 78.7) | 412,313 | 393,000 |
| 45 | 2013 | 3 | Dry | Northwest | 0 | Near | Rural | 76 | 71 | 78.9 | 85.7 (79.5, 91.9) | 203,420 | 192,167 |
| 41 | 2014 | 1 | Dry | North-central | 0 | Near | Urban | 73 | 73 | 75.3 | 75.2 (63.3, 87.0) | 500,210 | 500,210 |
| 100 | 2012 | 8, 9 | Dry, wet | Northwest | 0 | Far | Rural | 86 | 82 | 69.8 | 74.8 (63.1, 86.5) | 76,323 | 72,991 |
| 30 | 2013 | 1 | Dry | Northwest | 0 | Far | Rural | 84 | 82 | 75.0 | 79.4 (67.8, 90.9) | 46,442 | 44,956 |
| 20 | 2012 | 6, 7 | Wet, dry | Northwest | 0 | Far | Rural | 91 | 83 | 71.4 | 78.5 (68.5, 88.6) | 67,092 | 60,102 |
| 40 | 2011 | 10, 11 | Wet | North-central | 0 | Far | Urban | 94 | 87 | 79.8 | 86.2 (77.6, 94.8) | 41,662 | 37,812 |
The data in the table are sorted by IRS district, proximity to water (near/far), then by rural/urban. Urban and rural strata defined according to population count in the parish, based on the national census of 2002; proximity of village to water defined as “near” when the parish boundary was < 500 m from an all season surface water body (river, lake, or swamp), otherwise defined as “far”. 1 = January, 2 = February, 3 = March, 4 = April, 5 = May, 6 = June, 7 = July, 8 = August, 9 = September, 10 = October, 11 = November, 12 = December; NC North-central, NW Northwest, IRS indoor residual insecticide spray; dry season months were January to March and July to August; Wet season months were April to June and September to December; The season was deemed to be wet for children enrolled in villages 31 and 100 because most children were enrolled in the wet months, while season was deemed dry for children in village 20 because most were enrolled in the dry season month; Weights were trimmed to the 97th percentile, affecting 30 children whose weight was set to 14,409.34