Table 4.
Prevalence of light, moderate and heavy mean intensity of infections [% (95 % CI)] in Y1 and Y3 and relative reductions % (Wald test: Z-statistic, P-value)
| Light | Moderate | Heavy | |
|---|---|---|---|
| STH combined | |||
| Y1 baseline | 23.6 (22.0–25.4) | 8.5 (7.2–10.1) | 0.2 (0.1–0.5) |
| Y3 mid-term | 10.6 (9.4–12.0) | 5.7 (4.8–6.9) | 0 (0–0.1) |
| Relative reduction (%) | 55.1 (Z = -14.17, P < 0.001) | 32.7 (Z = -6.47, P < 0.001) | 75.1 (Z = -2.20, P = 0.028) |
| Hookworms | |||
| Y1 baseline | 15.1 (13.3–17.2) | 0.2 (0.1–0.3) | 0.1 (0–0.2) |
| Y3 mid-term | 2.2 (1.7–3.0) | 0 (0–0.1) | 0 (0–0.1) |
| Relative reduction | 85.2 (Z = -15.25, P < 0.001) | 86.9 (Z = -4.11, P < 0.001) | 61.7 (Z = -1.62, P = 0.105) |
| A. lumbricoides | |||
| Y1 baseline | 9.8 (8.7–11.2) | 8.2 (6.9–9.8) | naa |
| Y3 mid-term | 6.5 (5.6–7.5) | 5.4 (4.5–6.5) | naa |
| Relative reduction | 34.1 (Z = -6.87, P < 0.001) | 33.9 (Z = -6.79, P < 0.001) | |
| T. trichiura | |||
| Y1 baseline | 6.4 (5.2–7.8) | 0.2 (0.1–0.3) | 0.1 (0–0.6) |
| Y3 mid-term | 4.2 (3.1–5.5) | 0.3 (0.2–0.6) | 0 |
| Relative reduction | 34.6 (Z = -4.56, P < 0.001) | Increase (58.4 %) (Z = 1.70, P = 0.088) | 94.0 (Z = -1.98, P = 0.047) |
a A. lumbricoides egg counts were truncated at 24,000 epg hence their heavy intensity of infection was not measured