Table 3. Prevalence and intensity of S. mansoni infections by KK and POC-CCA according to age.
| Age | N | POC-CCA (%) | 95% CI | Mean POC-CCA values (mV) | 95%CI | KK(%) | 95% CI | Mean EPG | 95% CI |
|---|---|---|---|---|---|---|---|---|---|
| 5 | 43 | 13(30.2) | 16.1–51.7 | 112.98±121.06 | 107.22–118.85 | 2 (4.65) | 0.56–16.80 | 24±0.00 | 17.696–31.82 |
| 6 | 148 | 60(40.5) | 30.94–52.18 | 117.48±104.33 | 114.74–120.24 | 5 (3.38) | 1.09–7.88 | 648±707.50 | 625.88–670.7 |
| 7 | 121 | 49(40.5) | 29.96–53.54 | 181.17±152.85 | 177.41–184.97 | 9(7.44) | 3.40–14.12 | 290.67±281.80 | 279.63–302.02 |
| 8 | 73 | 28(38.4) | 25.49–55.44 | 128.77±123.85 | 124.58–133.02 | 6 (8.22) | 3.01–17.89 | 384±660.41 | 368.48–400.01 |
| 9 | 100 | 49(49) | 36.25–64.78 | 187.52±164.49 | 183.7–191.38 | 12 (12) | 6.2–20.96 | 176±149.82 | 168.57–183.67 |
| 10 | 111 | 41(36.9) | 26.51–50.11 | 171.23±128.09 | 167.24–175.27 | 12 (10.81) | 5.60–18.88 | 1120±2568.95 | 1101.1–1139.1 |
| 11 | 64 | 24(37.5) | 24.03–55.8 | 235.03±161.05 | 228.91–241.21 | 9(14.06) | 6.43–26.69 | 728±1199.70 | 710.48–745.84 |
| 12 | 57 | 26(45.6) | 29.8–66.84 | 209.62±147.90 | 204.09–215.26 | 9(15.79) | 7.22–29.97 | 248±244.75 | 237.82–258.51 |
| 13 | 32 | 15(46.9) | 26.24–77.31 | 244.40±175.34 | 236.55–252.44 | 5(15.63) | 5.07–36.46 | 849.6±562.24 | 824.24–875.54 |
| 14 | 10 | 4(40) | 10.9–102.4 | 251.53±198.13 | 236.2–267.53 | 2(20) | 2.42–72.25 | 876±899.44 | 835.46–918 |
| Total | 759 | 309(40.7) | 36.3–45.51 | 171.43±145.59 | 169.97–172.9 | 71(9.4) | 7.3–11.79 | 542.87±1197.86 | 537.47–548.32 |
| P | 0.64a | 0.00022b | 0.06a | 0.09b | |||||
| χ2 | 6.98 | - | 16.37 | - | |||||
| F | - | 40.36 | - | 3.53 |
N: Number of children analysed; POC-CCA: Number of children positive for POC-CCA test; KK: Number of children positive for the Kato Katz test; CI: Confidence interval; EPG: egg per gram of stool;
a: P-value for chi-square test;
b: P- value for linear regression model.