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Table 2 Comparison of S. mansoni prevalence (%) using POC-CCA and Kato-Katz techniques among school aged children

From: Comparing the performance of circulating cathodic antigen and Kato-Katz techniques in evaluating Schistosoma mansoni infection in areas with low prevalence in selected counties of Kenya: a cross-sectional study

County Kato Katz POC-CCA Kappa statistics (Agreement %)
Pre-treatment (%) Post-treatment (%) RR (%) Pre-treatment (%) Post-treatment (%) RR (%)
Overall 4.9 (4.0–5.9) 1.5 (1.0–2.1) 69.8 26.5 (24.6–28.6) 21.4 (19.6–23.4) 19.4 0.11 (77.1%)
Bomet 0 0 0 61.9 (53.3–71.9) 54.9 (46.0–65.5) 11.3 0.00 (42.1%)
Bungoma 0 2.0 (0.5–7.7) + 8.6 (4.6–16.0) 14.6 (9.1–23.2) + 0.06 (88.8%)
Busia 28.7 (23.2–35.5) 2.9 (1.3–6.4) 89.9* 46.6 (40.3–53.9) 23.3 (18.2–29.9) 50.0* 0.28 (71.4%)
Homa Bay 0 3.0 (1.0–9.1) + 8.3 (4.5–15.6) 13.9 (8.5–22.5) + 0.13 (89.3%)
Kakamega 1.9 (0.7–5.0) 5.8 (3.3–10.0) + 20.2 (15.4–26.5) 36.8 (30.8–44.0) + 0.12 (73.4%)
Kisii 0 0 0 12.1 (7.1–20.6) 15.0 (9.4–23.9) + 0.00 (86.1%)
Kisumu 7.1 (4.7–10.6) 1.3 (0.5–3.5) 81.4* 34.3 (29.4–40.1) 14.1 (10.7–18.6) 58.9* 0.15 (77.4%)
Kwale 0 0 0 6.6 (4.3–10.2) 8.5 (5.9–12.3) + 0.00 (92.5%)
Mombasa 1.9 (0.3–13.4) 0 100 9.7 (5.2–18.0) 5.6 (2.6–12.2) 42.1 −0.01 (90.3%)
Narok 0.9 (0.2–3.7) 0 100 47.4 (41.1–54.6) 42.9 (36.7–50.1) 9.5 0.01 (55.2%)
Taita Taveta 0 0 0 19.2 (12.8–28.8) 2.4 (0.6–9.3) 87.7 0.00 (88.5%)
  1. RR indicates relative reduction in prevalence
  2. +indicates an increase in prevalence rather than reduction
  3. *indicates a significant relative reduction in prevalence, p < 0.05