Table 4 Characteristics of study households and participants stratified by study site
From: Associations between urbanicity and malaria at local scales in Uganda
Characteristics | Walukuba | Kihihi | Nagongera |
|---|---|---|---|
At the household level | |||
Number of households | 100 | 100 | 100 |
Average altitude (m) | 1165 | 1103 | 1130 |
Electricity in home | 22 % | 4 % | 1 % |
Uses charcoal for cooking | 82 % | 10 % | 0 % |
Density of surrounding householdsa, mean (SD) | 225 (152) | 19 (32) | 7 (6) |
NDVI <0.45 unitsa | 66 % | 26 % | 28 % |
Night-time lights >3 unitsa | 29 % | 0 % | 0 % |
Mean land cover >20 % residential urbana | 41 % | N/A | N/A |
Total number of nights of mosquito collections | 2184 | 2252 | 2329 |
Total number of female Anopheles mosquitoes | 2358 | 10,370 | 100,890 |
Household density of mosquitoes per night (95 % CI) | 1.1 (1.0–1.1) | 4.6 (4.5–4.7) | 43.3 (43.1–43.6) |
At the individual cohort participant level | |||
Number of participants | 348 | 419 | 400 |
Mean age in years during follow-up (children) | 5.0 | 5.6 | 5.4 |
Mean age in years during follow-up (adults) | 33.4 | 38.3 | 39.0 |
Total number of routine blood slides | 2613 | 3376 | 3231 |
Parasite prevalence (95 % CI) | 6.1 (5.2–7.1 %) | 7.9 (7.0–8.8 %) | 22.5 (21.0–23.9 %) |
Person years of observation | 606.7 | 771.8 | 746.9 |
Total episodes of malaria | 217 | 905 | 1619 |
Incidence of malaria per person years (95 % CI) | 0.36 (0.31–0.41) | 1.17 (1.10–1.25) | 2.17 (2.06–2.28) |