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Table 2 Incidence rate of clinical malaria attacks and estimations from univariate analysis of individual and collective 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
Age        
18 - 24 y 66 2 087 262 561 7.65 1   
25 - 29 y 49 1 432 178 907 8,33 1,12 0,77 - 1,64 0,54
30 - 39 y 22 866 110 038 6,08 0,82 0,50 - 1,34 0,43
40 - 56 y 3 137 17 568 5.19 0,74 0,23 - 2,44 0,63
Manager        
No 117 3 223 405 122 8.48 1   
Yes 23 1 308 167 240 4.91 0,596 0,380 - 0,935 0,024
Age and manager status        
Manager 23 1 162 146 591 4.77 1   
Non Manager        
 18 - 19 y 7 256 32 198 6.61 1,19 0,51 - 2,81 0,682
 20 - 24 y 53 1 607 203 061 7.94 1,62 0,96 - 2,58 0,074
 ≥25 y 57 1 491 188 744 9.19 1,90 1,16 - 3,09 0,010
Year of arrival in Ivory Coast        
2002, 2003, 2005 or 2006 49 2 519 298 597 4.99 1   
2004 91 2 012 273 766 10.1 1,80 1,10 - 2,97 0,020
Number of sites visited        
 <10 sites 98 3 469 430 613 6.78 1   
 ≥10 sites 42 1 062 141 750 9.01 1,454 0,866 - 2,442 0,157
Average duration of the stay by site        
 <15 days 44 1 382 164 372 8.14 1   
 ≥15 days 96 3 149 407 991 7.16 0,813 0,486 - 1,360 0,43
  1. CI = confi dence interval; RR = relative risk.