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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