Table 2 Pooled prevalence estimates for STH infections in Nigerian children stratified according to sub-groups
Variables | No. of studies | Pooled prevalence estimates | 95% CI | Heterogeneity | |||
|---|---|---|---|---|---|---|---|
Sample size | Positives | Prevalence (%) | I2 (%) | Q-P | |||
Region | |||||||
 North-central | 6 | 3156 | 1507 | 47.8 | 46.0–49.5 | 99.4 | 0.000 |
 North-east | 1 | 250 | 114 | 45.6 | 39.3–52.0 | 0.0 | 0.000 |
 North-west | 2 | 1370 | 181 | 13.2 | 11.5–15.1 | 90.0 | 0.002 |
 South-east | 7 | 4653 | 2174 | 46.7 | 45.3–48.2 | 99.4 | 0.000 |
 South-south | 10 | 8264 | 3953 | 47.8 | 46.8–48.9 | 98.8 | 0.000 |
 South-west | 15 | 16 825 | 10 972 | 65.2 | 64.5–65.9 | 99.5 | 0.000 |
Study period | |||||||
 1980–1991 | 4 | 8330 | 6736 | 80.9 | 80.0–81.7 | 98.9 | 0.000 |
 1992–2003 | 7 | 7682 | 3932 | 51.2 | 50.1–52.3 | 99.5 | 0.000 |
 2004–2014 | 30 | 18 506 | 8233 | 44.5 | 43.8–45.2 | 99.1 | 0.000 |
Sample size | |||||||
 100–500 | 23 | 6903 | 3375 | 48.9 | 47.7–50.1 | 98.6 | 0.000 |
 501–1000 | 6 | 4306 | 2176 | 50.5 | 49.3–52.0 | 99.6 | 0.000 |
 1001–1500 | 7 | 7996 | 5473 | 68.5 | 67.4–69.5 | 99.6 | 0.000 |
  > 1500 | 5 | 15 313 | 7877 | 51.4 | 50.7–52.2 | 99.8 | 0.000 |
Study setting | |||||||
 Community-based | 9 | 4936 | 2914 | 59.0 | 57.7–60.4 | 99.4 | 0.000 |
 Hospital-based | 2 | 517 | 214 | 41.4 | 37.1–45.8 | 99.1 | 0.000 |
 School-based | 30 | 29 065 | 15 773 | 54.3 | 53.7–54.8 | 99.5 | 0.000 |
SPSAG | |||||||
 SAC | 33 | 30 319 | 16 643 | 54.9 | 54.3–55.5 | 99.5 | 0.000 |
 PSAC | 8 | 4199 | 2258 | 53.8 | 52.3–55.3 | 99.2 | 0.000 |
Overall | 41 | 34 518 | 18 901 | 54.8 | 54.2–55.3 | 99.4 | 0.000 |