Table 1 Characteristics of study participants
Variable | CS1 | CS2 | χ 2 | P-value | ||
|---|---|---|---|---|---|---|
| Â | n | % | n | % | ||
Total | 2010 | 100.0 | 2073 | 100.0 | Â | Â |
Demographic | ||||||
Community | ||||||
 Ipiranga | 439 | 21.8 | 487 | 23.5 | 34.507 | < 0.0001 |
 Brasileirinho | 1185 | 59.0 | 1049 | 50.6 |  |  |
 Puraquequara | 386 | 19.2 | 537 | 25.9 |  |  |
Gender | ||||||
 Male | 1058 | 52.6 | 1080 | 52.1 | 0.119 | 0.731 |
 Female | 952 | 47.4 | 993 | 47.9 |  |  |
Age group | ||||||
 < 5 yrs | 256 | 12.7 | 251 | 12.1 | 2.815 | 0.589 |
 ≥ 5–11 yrs | 361 | 18.0 | 349 | 16.8 |  |  |
 12–17 yrs | 253 | 12.6 | 249 | 12.0 |  |  |
 18–59 yrs | 957 | 47.7 | 1017 | 49.1 |  |  |
 ≥ 60 yrs | 181 | 9.0 | 207 | 10.0 |  |  |
Occupation | ||||||
 Office worker and higher education student | 318 | 15.8 | 296 | 14.3 | 45.221 | < 0.0001 |
 Agriculture/fishing | 349 | 17.4 | 277 | 13.4 |  |  |
 Housewife | 289 | 14.4 | 346 | 16.7 |  |  |
 Retired | 106 | 5.3 | 97 | 4.7 |  |  |
 School children | 481 | 23.9 | 484 | 23.4 |  |  |
 Infants and preschool children | 312 | 15.5 | 300 | 14.5 |  |  |
 Unemployed/ other | 154 | 7.7 | 269 | 13.0 |  |  |
More than 2 months in the area | ||||||
 Yes | 1866 | 93.8 | 2017 | 97.8 | 40.359 | < 0.0001 |
 No | 124 | 6.2 | 46 | 2.2 |  |  |
Recent travel (last month) | ||||||
 Yes | 188 | 9.4 | 186 | 9.0 | 0.196 | 0.658 |
 No | 1814 | 90.6 | 1883 | 91.0 |  |  |
Malaria control | ||||||
Use of a bednet | ||||||
 No use | 1002 | 49.9 | 1297 | 62.6 | 317.571 | < 0.0001 |
 < 1 yr | 940 | 46.8 | 487 | 23.5 |  |  |
 1–2 yrs | 68 | 3.4 | 289 | 13.9 |  |  |
IRS past 6 months | ||||||
 Yes | 1140 | 56.7 | 759 | 36.6 | 165.854 | < 0.0001 |
 No | 869 | 43.3 | 1313 | 63.3 |  |  |
Fly screen | ||||||
 Yes | 376 | 18.8 | 408 | 19.7 | 0.565 | 0.452 |
 No | 1627 | 81.2 | 1663 | 80.3 |  |  |
Malaria morbidity | ||||||
Previous episodes | ||||||
 0 | 587 | 29.3 | 606 | 29.3 |  |  |
 1–3 | 656 | 32.8 | 614 | 29.6 | 6.479 | 0.091 |
 4–10 | 455 | 22.7 | 487 | 23.5 |  |  |
 > 10 | 303 | 15.1 | 359 | 17.3 |  |  |
Episode in past two weeks | ||||||
 Yes | 24 | 1.2 | 21 | 1.0 | 0.307 | 0.580 |
 No | 1986 | 98.8 | 2052 | 99.0 |  |  |
Current symptoms | ||||||
 Fevera | 108 | 5.4 | 84 | 4.1 | 3.974 | 0.046 |
 Symptoms other than feverb | 76 | 3.8 | 16 | 0.8 | 42.857 | < 0.0001 |