Table 4.
Factors associated with sub-microscopic parasitaemia if parasitaemic, stratified by study site
| Factor | Walukuba | Kihihi | Nagongera | ||||||
|---|---|---|---|---|---|---|---|---|---|
| Prevalence | RR (95 % CI) | p value | Prevalence | RR (95 % CI) | p value | Prevalence | RR (95 % CI) | p value | |
| Age groups (years) | |||||||||
| 0.5– <2 | 14/18 (77.8 %) | 1.22 (0.94–1.58) | 0.14 | 23/34 (67.7 %) | 0.95 (0.75–1.22) | 0.71 | 70/97 (72.2 %) | 1.11 (0.96–1.29) | 0.15 |
| 2– <5 | 81/126 (64.3 %) | 1.09 (0.89–1.33) | 0.41 | 146/206 (70.9 %) | 1.00 (0.90–1.12) | 0.95 | 243/401 (60.6 %) | 1.02 (0.91–1.13) | 0.77 |
| 5– <11 | 95/165 (57.6 %) | Reference group | 336/485 (69.3 %) | Reference group | 533/933 (57.1 %) | Reference group | |||
| ≥18 | 99/119 (83.2 %) | 1.43 (1.20–1.71) | <0.001 | 140/163 (85.9 %) | 1.25 (1.13–1.38) | <0.001 | 354/393 (90.1 %) | 1.65 (1.53–1.79) | <0.001 |
| Symptomatic malaria in prior 30 days | |||||||||
| No | 263/399 (65.9 %) | Reference group | 537/761 (70.6 %) | Reference group | 987/1562 (63.2 %) | Reference group | |||
| Yes | 26/29 (89.7 %) | 1.36 (1.17–1.58) | <0.001 | 108/127 (85.0 %) | 1.27 (1.15–1.40) | <0.001 | 213/262 (81.3 %) | 1.42 (1.31–1.55) | <0.001 |
Relative risk is adjusted for repeated measures in the same study participant
Excludes samples from enrollment visits, for which data on malaria diagnosis in past 30 days is missing