Table 2 Baseline, midterm and endline prevalence, mean intensity of infection and relative reductions % (Wald test: Z-statistic, P-value) among Kenyan school-aged children, 2012–2017
Baseline | Midterm | Endline | Relative reduction (Baseline – Endline) | |
|---|---|---|---|---|
Survey prevalence, % (95% CI) | ||||
STH Combined | 32.3 (30.0–34.8) | 16.4 (14.4–18.6) | 13.5 (11.6–15.7) | 58.2 (Z = -1.20, P < 0.001) |
Hookworm | 15.4 (13.6–17.6) | 2.3 (1.8–3.0) | 1.3 (1.0–1.6) | 91.6 (Z = -21.34, P < 0.001) |
A. lumbricoides | 18.1 (15.8–20.7) | 11.9 (10.2–13.9) | 9.6 (8.0–11.5) | 46.8 (Z = -10.82, P < 0.001) |
T. trichiura | 6.7 (5.4–8.2) | 4.5 (3.4–6.0) | 4.1 (3.1–5.5) | 38.4 (Z = -5.38, P < 0.001) |
S. mansoni | 2.1 (1.3–3.5) | 1.5 (0.7–3.1) | 1.7 (1.0–2.8) | 19.3 (Z = -1.86, P = 0.062) |
S. haematobium | 14.8 (11.3–19.5) | 6.8 (4.3–10.7) | 2.4 (1.3–4.3) | 84.0 (Z = -5.74, P < 0.001) |
Mean intensity, epg (95% CI) | ||||
STH Combined | 1756 (1472–2094) | 985 (824–1177) | 944 (774–1151) | 46.3 (Z = -9.17, P < 0.001) |
Hookworm | 63 (50–81) | 8 (5–14) | 10 (5–19) | 84.2 (Z = -5.58, P < 0.001) |
A. lumbricoides | 1659 (1378–1998) | 960 (801–1151) | 917 (750–1121) | 44.7 (Z = -8.27, P < 0.001) |
T. trichiura | 33 (11–105) | 17 (11–26) | 16 (10–26) | 50.9 (Z = -1.15, P < 0.001) |
S. mansoni | 12 (4–36) | 5 (2–14) | 5 (2–9) | 61.6 (Z = -3.10, P = 0.002) |
S. haematobium | 16 (10–26) | 7 (4–12) | 2 (1–5) | 87.2 (Z = -4.18, P < 0.001) |