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Volume 9, Number 4—April 2003
Research

Dengue Fever in Travelers to the Tropics, 1998 and 1999

Heidi Lindbäck*†, Johan Lindbäck†, Anders Tegnell†, Ragnhild Janzon†, Sirkka Vene†, and Karl Ekdahl†Comments to Author 
Author affiliations: *Uppsala University, Uppsala, Sweden; †Swedish Institute for Infectious Disease Control, Solna, Sweden

Main Article

Table 3

Odds ratios for diagnosis of dengue fever, calculated for possible risk factors

Risk factor Ratio in cases Ratio in controls Odds ratio 95% CIa
Geographic area




India with neighbors
7/105
7/292
2.91
0.89 to 9.50
Malay Peninsula
79/105
111/292
4.95
2.92 to 8.46
China
0/105
17/292
0.00
0.00 to 0.65
The rest of Asia
3/105
15/292
0.54
0.10 to 1.98
Carribean
4/105
40/292
0.25
0.06 to 0.72
Central America
3/105
17/292
0.48
0.11 to 1.77
South America
1/105
21/292
0.12
0.00 to 0.79
West Africa
0/105
6/292
0.00
0.00 to 2.60
East Africa
1/105
4/292
0.69
0.01 to 7.11
South Africa
0/105
11/292
0.00
0.00 to 1.09
Australia and Pacific Islands
7/105
43/292
0.41
0.15 to 0.97
Age groups (y)




0–14
2/107
14/292
0.38
0.04 to 1.69
15–29
58/107
82/292
3.03
1.87 to 4.92
30–44
33/107
79/292
1.20
0.72 to 2.01
>45
14/107
117/292
0.23
0.12 to 0.43
Sex




Male
54/107
154/292
0.91
0.57 to 1.46
Length of travel (nights)




0–10
0/74
68/292
0.00
0.00 to 0.17
11–17
16/74
149/292
0.26
0.14 to 0.50
18–24
13/74
31/292
1.79
0.83 to 3.82
>25 45/74 44/292 8.75 4.79 to 16.06

aCI, confidence interval.

Main Article

Page created: December 08, 2010
Page updated: December 08, 2010
Page reviewed: December 08, 2010
The conclusions, findings, and opinions expressed by authors contributing to this journal do not necessarily reflect the official position of the U.S. Department of Health and Human Services, the Public Health Service, the Centers for Disease Control and Prevention, or the authors' affiliated institutions. Use of trade names is for identification only and does not imply endorsement by any of the groups named above.
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