Table 3. Prevalence and infection intensity of S. mansoni infections according to sex.
| Sex | NUA | POC-CCA+ (%) | 95% CIa | Mean CCA value (mv) ± SD | 95% CIb | NSA | KK+ (%) | 95% CIa | Mean EPG ± SD | 95% CIb |
|---|---|---|---|---|---|---|---|---|---|---|
| Male | 1188 | 638(53.7) | 49.6–58 | 177.3±151.1 | 176.2–178.5 | 946 | 79(8.3) | 6.6–10.4 | 404±820.1 | 399.6–408.5 |
| Female | 1065 | 519 (48.7) | 44.6–53.1 | 190.7±154.8 | 189.6–191.7 | 827 | 50 (6) | 4.4–7. 9 | 497.2±1037.5 | 491.1–503.5 |
| P-value | 0.018a | 0.14c | 0.06a | 0.57c | ||||||
| χ 2 | 5.5, df = 1 | - | 3.4, df = 1 | - | ||||||
| t | - | 1.4 | - | 0.5 |
NUA: Number of urine samples analysed; NSA: Number of stool samples analysed; POC-CCA+: Number of children positive for POC-CCA test; KK+: 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 girls or boys positive either for KK or POC-CCA by the total number of girls or boys. 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 quantity of CCA in girls or boys positive either to KK or POC-CCA by the total number of girls or boys who were positive to the corresponding test; df: degree of freedom.