Table 2.
Distribution of malaria infection by study round (R), village, ecosystem and watershed
| Variable | Negative N (%) |
Positive N (%) |
Total N (%) |
p-valuea |
|---|---|---|---|---|
| Survey rounds (R) | ||||
| R1 (August: dry and cool) | 1321 (25.5) | 767 (28.2) | 2088 (26.5) | < 0.001 |
| R2 (November: short rains) | 1183 (22.9) | 730 (26.9) | 1913 (24.3) | |
| R3 (February: dry and hot) | 1405 (27.2) | 508 (18.7) | 1913 (24.3) | |
| R4 (May: long rains) | 1263 (24.4) | 711 (26.2) | 1974 (25.0) | |
| Village | ||||
| Komtonga | 380 (7.4) | 746 (27.5) | 1126 (14.3) | < 0.001 |
| Mkindo | 672 (13) | 470 (17.3) | 1142 (14.5) | |
| Mbogo | 655 (12.7) | 557 (20.5) | 1212 (15.4) | |
| Dihombo | 789 (15.3) | 206 (7.6) | 995 (12.6) | |
| Luhindo | 776 (15) | 349 (12.9) | 1125 (14.3) | |
| Dakawa | 786 (15.2) | 301 (11.1) | 1087 (13.8) | |
| Mtibwa | 1114 (21.5) | 87 (3.2) | 1201 (15.2) | |
| Ecosystem | ||||
| Savannah | 1575 (30.5) | 507 (18.7) | 2082 (26.4) | < 0.001 |
| Rice-irrigation | 2483 (48) | 2122 (78.1) | 4605 (58.4) | |
| Sugarcane | 1114 (21.5) | 87 (3.2) | 1201 (15.2) | |
| Water shed area | ||||
| High | 1707 (33) | 1773 (65.3) | 3480 (44.1) | <0.001 |
| Medium–Low | 2351 (45.5) | 856 (31.5) | 3207 (40.7) | |
| Dry | 1114 (21.5) | 87 (3.2) | 1201 (15.2) | |
| Total | 5172 (65.6) | 2716 (34.4) | 7888 | |
ap-values estimated from Chi square test of association