Table 3.
Longitudinal clinical metrics among cohort participants
| Measure | Age-group (years) | |||
|---|---|---|---|---|
| All | < 5 | 5–15 | > 15 | |
| Person years of follow-up | 954.5 | 250.4 | 400.0 | 304.4 |
| Incident episodes of malaria | 38 | 12 | 20 | 6 |
| Incidence of malaria per person years | 0.040 | 0.048 | 0.050 | 0.020 |
| Prevalence of microscopic parasitemia* | 244/12,696 (1.9%) | 40/3,352 (1.2%) | 173/5,307 (3.3%) | 31/4,037 (0.8%) |
| Geometric mean parasite density/µL (95% CI) | 200 (157–256) | 540 (262–1,110) | 165 (127–215) | 165 (77–356) |
| Prevalence of microscopic or submicroscopic parasitemia* | 1,314/12,695 (10.4%) | 134/3,352 (4.0%) | 743/5,306 (14.0%) | 437/4,037 (10.8%) |
| Geometric mean parasite density/µL (95% CI) | 3 (2–3) | 6 (3–13) | 5 (4–6) | 1 (1–1) |
| Prevalence of microscopic gametocytemia* | 50/12,696 (0.4%) | 15/3,352 (0.5%) | 30/5,307 (0.6%) | 5/4,037 (0.1%) |
| Prevalence of anemia (Hb < 11 gm/dL)† | 146/4,334 (3.4%) | 101/1,147 (8.8%) | 36/1813 (2.0%) | 9/1,374 (0.7%) |
*
Measured at the time of routine visits (enrollment and every 4 weeks during follow-up).
†
Measured at the time of routine visits (enrollment and every 12 weeks during follow-up).