Table 4. The prevalence of S. mansoni infection of selected primary school children before and after administration of praziquantel.
| Units | Schools | Baseline survey | Follow-up survey* | OR | 95% CI | P-value | ||
| Exam. No | Positive No. (%) | Exam. No | Positive No. (%) | |||||
| Al Jabalain | Al Hidaib | 90 | 2 (2.2) | 147 | 0 (0.0) | - | - | - |
| Khour Ajwal | 91 | 1 (1.1) | 153 | 0 (0.0) | - | - | - | |
| Subtotal | 181 | 3 (1.7) | 300 | 0 (0.0) | - | - | - | |
| Assalaya | Assalaya East | 109 | 0 (0.0) | 285 | 6 (2.1) | - | - | - |
| Jazeera Aba | Tayba boys | 97 | 1 (1.0) | 140 | 4 (2.9) | 2.824 | 0.311–25.657 | 0.357 |
| Tayba girls | 93 | 0 (0.0) | 142 | 2 (1.4) | - | - | - | |
| Subtotal | 190 | 1 (0.5) | 282 | 6 (2.1) | 4.109 | 0.491–34.404 | 0.192 | |
| Joda | Al Barra Ebn Malik | 128 | 0 (0.0) | 144 | 0 (0.0) | - | - | - |
| Abu Baker Alsiddig | 87 | 0 (0.0) | 149 | 0 (0.0) | - | - | - | |
| Subtotal | 215 | 0 (0.0) | 293 | 0 (0.0) | - | - | - | |
| Kenana | Al Farook boys | 148 | 0 (0.0) | 109 | 0 (0.0) | - | - | - |
| Abd RahmanEbnouf mixed | 198 | 0 (0.0) | 152 | 1 (0.7) | - | - | - | |
| Subtotal | 346 | 0 (0.0) | 261 | 1 (0.4) | - | - | - | |
| Rabak | Abu Tileih boys | 99 | 1 (1.0) | 158 | 3 (1.9) | 1.897 | 0.195–18.493 | 0.582 |
| Al Khansa girls | 65 | 0 (0.0) | 150 | 1 (0.7) | - | - | - | |
| Al Wifak boys | 180 | 0 (0.0) | 138 | 0 (0.0) | - | - | - | |
| Subtotal | 344 | 1 (0.3) | 446 | 4 (0.9) | 3.104 | 0.345–27.898 | 0.312 | |
| Total | Boys | 1,195 | 5 (0.4) | 1,575 | 14 (0.9) | 2.110 | 0.660–6.745 | 0.208 |
| Girls | 190 | 0 (0.0) | 292 | 3 (1.0) | 3.023 | 0.369–24.738 | 0.302 | |
| Total | 1,385 | 5 (0.4) | 1,867 | 17 (0.9) | 2.536 | 0.933–6.891 | 0.068 | |
* The follow-up survey was conducted at 6–9 months after the chemotherapy.