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Table 2 Pooled prevalence estimates for STH infections in Nigerian children stratified according to sub-groups

From: Prevalence and distribution of soil-transmitted helminth infections in Nigerian children: a systematic review and meta-analysis

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
  1. CI Confidence interval, I2 Inverse variance index, Q-P Cochran’s P-value, SPSAG School/Preschool-age groups, SAC School-aged children, PSAC Preschool-aged children