Table 3 Prevalence and incidence of asymptomatic P. falciparum parasitaemia at baseline and during tri-monthly follow-up
Variables | Village status | Baseline | Follow-up time | Over follow-up time | |||
|---|---|---|---|---|---|---|---|
M0 | M3 | M6 | M9 | M12 | |||
Number of villagers* | Early MDA | 859 | 745 | 801 | 792 | 808 | |
Deferred-MDA | 802 | 722 | 655 | 618 | 689 | ||
Number of Pf infections | Early MDA | 41 | 0 | 9 | 5 | 6 | |
Deferred-MDA | 140 | 90 | 98 | 85 | 80 | ||
Pf prevalence, % and (95% CI) | Early MDA* | 4.8 (3.4–6.4) | 0 (0–0.5) | 1.1 (0.5–2.1) | 0.6 (0.2–1.5) | 0.7 (0.3–1.6) | |
Deferred-MDA | 17.5 (15.9–20) | 12.5 (10.1–15.1) | 15 (12.3–17.9) | 13.8 (11.1–16.7) | 11.6 (9.3–14.2) | ||
Comparison between group, AOR (95% CI, p-value) ** | 0.18 (0.01–3.38, 0.254) | 0.07 (0.01–1.26, 0.072) | 0.13 (0.01–2.37, 0.170) | 0.42 (0.01–12.28, 0.611) | |||
Pf exposure time (person-years) | Early MDA | N/A | 183 | 196 | 192 | 198 | |
Deferred-MDA | N/A | 176 | 159 | 151 | 167 | ||
Incidence of Pf infection (per 1000 person-years) | Early MDA | N/A | 0 (0–20) | 46 (21–87) | 26 (8–61) | 30 (11–66) | |
Deferred-MDA | N/A | 510 (410–627) | 617 (501–752) | 563 (450–696) | 478 (379–595) | ||
Comparison between group, AIRR (95% CI, p-value)** | 0.21 (0.01–3.08, 0.254) | 0.09 (0.01–1.24, 0.071) | 0.15 (0.01–2.24, 0.169) | 0.08 (0.01–0.88, 0.039) | |||