Table 4. Prevalence and infection intensity of S. mansoni infections according to age groups.
| Age group | NUA | POC-CCA+ (%) | 95% CIa | Mean CCA value (mv) ± SD | 95% CIb | NSA | KK (%) | 95% CIa | Mean EPG ± SD | 95% CIb |
|---|---|---|---|---|---|---|---|---|---|---|
|
[5–10]
[11–15] |
1809 444 |
885(48.9) 272 (61.3) |
45.75–52.2 54.2–68.9 |
175.52 ± 147.9 214.59 ± 166.1 |
174.6–176.4 212.8–216.3 |
1426 347 |
90 (6.3) 39 (11.2) |
5.08–7.7 7.99–15.3 |
424.8 ± 906 475.69 ± 922.7 |
420.55–429.1 468.87–482.6 |
| P-value | < 0.0001a | 0.004c | 0.002a | 0.66c | ||||||
| χ 2 | 21.72 | - | 10.04 | - | ||||||
| t | - | 3.69 | - | 0.29 |
NUA: Number of urine samples analysed; NSA: Number of stool samples analysed; POC-CCA+: Number of children positive for the POC-CCA test; KK+: Number of children positive for the Kato Katz; CCA: Circulating cathodic antigen; EPG: egg per gram of stool; SD: Standard deviation; mv: millivolts; a: P value for chi-square test; c: P value for Student’s t-test. 95% CIa: 95% confidence interval associated to prevalence; it was obtained by dividing in the MedCalc online software, the number of children positive either for KK or POC-CCA in each age group by the total number of children in that age group. 95% CIb: 95% confidence interval associated to the mean of infection intensity; it was obtained by dividing, in the MedCalc online software, the sum of EPG or the amount of CCA in children positive either for KK or POC-CCA in each age group by the total number of children who were positive to the corresponding test in that age group, df: degree of freedom.