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Table 2 Incidence rate of clinical malaria attacks and estimations from univariate analysis of individual and collective variables (nā€‰=ā€‰4 531, except other indication)

From: Environmental determinant of malaria cases among travellers

Ā 

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

Ā Ā Ā Ā Ā Ā Ā 

18 - 24 y

66

2 087

262 561

7.65

1

Ā Ā 

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

Ā Ā Ā Ā Ā Ā Ā 

No

117

3 223

405 122

8.48

1

Ā Ā 

Yes

23

1 308

167 240

4.91

0,596

0,380 - 0,935

0,024

Age and manager status

Ā Ā Ā Ā Ā Ā Ā 

Manager

23

1 162

146 591

4.77

1

Ā Ā 

Non Manager

Ā Ā Ā Ā Ā Ā Ā 

ā€ƒ18 - 19 y

7

256

32 198

6.61

1,19

0,51 - 2,81

0,682

ā€ƒ20 - 24 y

53

1 607

203 061

7.94

1,62

0,96 - 2,58

0,074

ā€ƒā‰„25 y

57

1 491

188 744

9.19

1,90

1,16 - 3,09

0,010

Year of arrival in Ivory Coast

Ā Ā Ā Ā Ā Ā Ā 

2002, 2003, 2005 or 2006

49

2 519

298 597

4.99

1

Ā Ā 

2004

91

2 012

273 766

10.1

1,80

1,10 - 2,97

0,020

Number of sites visited

Ā Ā Ā Ā Ā Ā Ā 

ā€ƒ<10 sites

98

3 469

430 613

6.78

1

Ā Ā 

ā€ƒā‰„10 sites

42

1 062

141 750

9.01

1,454

0,866 - 2,442

0,157

Average duration of the stay by site

Ā Ā Ā Ā Ā Ā Ā 

ā€ƒ<15ā€‰days

44

1 382

164 372

8.14

1

Ā Ā 

ā€ƒā‰„15ā€‰days

96

3 149

407 991

7.16

0,813

0,486 - 1,360

0,43

  1. CIā€‰=ā€‰confi dence interval; RRā€‰=ā€‰relative risk.