Table 4.
Incidence rate of clinical malaria attacks and estimations from univariate analysis of remote sensing variables (n = 4 531, except other indication)
| Number of clinical malaria attacks | Number of individuals | Number of person-days under survey | Incidence rate per 1,000 person-month | RR | 95% CI | p | |
|---|---|---|---|---|---|---|---|
|
NDVI |
|
|
|
|
|
|
|
|
NDVI (M0)* >0,35 |
|
|
|
|
|
|
|
| < 66% duration of stay |
70 |
2 391 |
298 185 |
7.14 |
1 |
|
|
| ≥66% duration of stay |
70 |
2 140 |
274 178 |
7.76 |
1,10 |
0,66 - 1,83 |
0,724 |
|
NDVI (M-1)* >0,35 |
|
|
|
|
|
|
|
| < 66% duration of stay |
77 |
2 730 |
342 844 |
6.83 |
1 |
|
|
| ≥66% duration of stay |
63 |
1 801 |
229 519 |
8.35 |
1,33 |
0,80 - 2,23 |
0,268 |
|
NDVI (M-2)* >0,35 |
|
|
|
|
|
|
|
| < 66% duration of stay |
77 |
2 890 |
365 385 |
6.41 |
1 |
|
|
| ≥66% duration of stay | 63 | 1 641 | 206 978 | 9.26 | 1,60 | 0,97 - 2,66 | 0,067 |
CI = confidence interval; NDVI = Normalized Difference Vegetation Index; RR = relative risk; * : M0, M-1 & M-2 correspond to the estimates of NDVI calculated with 0, 1 and 2 months of decay between the remote sensing and the period of stay in the sites.