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Table 4 Incidence rate of clinical malaria attacks and estimations from univariate analysis of remote sensing variables (n = 4 531, except other indication)

From: Environmental determinant of malaria cases among travellers

  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
  1. 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.