Table 2.
Risk of being Plasmodium falciparum Infected (PCR Positive) by Proximity to an Identified RDT-Positive Individual or by Serostatus
| Residence or Serostatus | PCR Positive (95% CI), % | OR (95% CI)a |
|---|---|---|
| Proximity of residence to RDT-positive individual | ||
| Same household | 11.5 (4.2–25.5) | 7.4 (2.8–19.9) |
| <100-m radius | 2.2 (0.7–5.8) | 1.2 (0.4–3.3) |
| 100–300 m | 3.4 (2.1–5.4) | 1.8 (1.0–3.2) |
| 300–1000 m | 1.9 (1.4–2.6) | 1.0 (0.7–1.6) |
| >1000 m | 1.9 (1.4–2.5) | 1.0 (baseline) |
| Serostatus | ||
| Seropositiveb | 5.0 (3.9–6.5) | 3.5 (2.2–5.5) |
| Seronegative in seropositive household | 1.3 (0.8–2.0) | 0.9 (0.5–1.6) |
| Living in seronegative household | 1.5 (1.0–2.2) | 1.0 (baseline) |
Abbreviations: CI, confidence interval; OR, odds ratio; PCR, polymerase chain reaction; RDT, rapid diagnostic test.
aUnivariate logistic regression for likelihood of being PCR positive.
bSeropositive to AMA-1 and/or MSP-119.