| Risk factors | Cases tested | Cases affected (%) | df | χ2 | p-value |
|---|
| Locality | | | 10 | 19.37 | 0.044 |
| Kassala | 105 | 8 (7.6%) | | | |
| R. Kassala | 84 | 11 (13.1%) | | | |
| W. Kassala | 70 | 12 (17.1%) | | | |
| New Halfa | 83 | 7 (8.4%) | | | |
| Atbara River | 70 | 9 (12.9%) | | | |
| Hamashkorieb | 53 | 6 (11.3%) | | | |
| Elgirba | 49 | 7 (14.3%) | | | |
| Delta North | 50 | 1 (2.0%) | | | |
| R. Aroma | 22 | (00.0%) | | | |
| Talkuk | 61 | 7 (11.5%) | | | |
| Wad Elheiliew | 54 | 12 (22.2%) | | | |
| Age | | | 1 | 17.06 | 0.001 |
| young | 309 | 18 (5.87%) | | | |
| Old | 392 | 62 (15.8%) | | | |
| gender | | | 1 | 1.16 | 0.281 |
| female | 320 | 32 (10.6%) | | | |
| male | 381 | 48 (12.6%) | | | |
| Education | | | 4 | 1.13 | 0.897 |
| illiterate | 177 | 19 (10.7%) | | | |
| primary | 233 | 30 (12.9%) | | | |
| secondary | 146 | 14 (9.6%) | | | |
| university | 92 | 11 (12.%) | | | |
| informal study | 53 | 6 (11.3%) | | | |
| Income | | | 2 | 3.98 | 0.136 |
| low | 440 | 56 (12.7%) | | | |
| medium | 146 | 17 (11.6%) | | | |
| high | 115 | 7 (6.1) | | | |
| Work | | | 1 | 0.05 | 0.809 |
| unemployed | 298 | 33 (11.1%) | | | |
| employed | 403 | 47 (11.7%) | | | |
| Disease awareness | | | 1 | 3.38 | 0.06 |
| no | 645 | 75 (12.3%) | | | |
| yes | 56 | 5 (5.6%) | | | |
| Mosquito net use | | | 1 | 6.16 | 0.013 |
| no | 342 | 43 (12.3%) | | | |
| yes | 359 | 37 (10.6%) | | | |
| Mosquito control | | | 1 | 12.38 | 0.001 |
| No | 313 | 126 (40.3%) | | | |
| yes | 388 | 205 (53.6%) | | | |
