Volume 17, Number 5—May 2011
Research
Travel-related Dengue Virus Infection, the Netherlands, 2006–2007
Table 1
Characteristics of 1,207 persons who traveled from the Netherlands to dengue-endemic countries and who attended a travel clinic for pretravel health advice, October 1, 2006–September 30, 2007*
Characteristic | Total, no. (%) | Previous DENV |
Univariate analysis |
Multivariate analysis |
|||||
---|---|---|---|---|---|---|---|---|---|
No. | PR, % | PRR (95% CI) | p value | PRR (95% CI) | p value | ||||
No. participants |
1,207 (100) |
78 |
6.5 |
NA |
|||||
Sex | |||||||||
M | 521 (43) | 29 | 5.6 | 1 | |||||
F |
686 (57) |
49 |
7.1 |
1.3 (0.81–2.1) |
0.27 |
||||
Median age, y, IQR |
38, 29–51 |
49, 35–59 |
1.04 (1.02–1.06) |
<0.0001 |
1.03 (1.01–1.05) |
0.003 |
|||
Country of birth | |||||||||
Non–dengue-endemic country | 1,118 (93) | 40 | 3.6 | 1 | 1 | ||||
Dengue-endemic country |
89 (7) |
38 |
43 |
20.1 (11.9–34.0) |
<0.0001 |
14.4 (8.1–25.6) |
<0.0001 |
||
No. times previously traveled to a dengue-endemic country | <0.0001 | 0.004 | |||||||
0–1 | 447 (37) | 5 | 1.1 | 1 | 1 | ||||
2–5 | 477 (40) | 35 | 7.3 | 7.0 (2.7–18.0) | <0.0001 | 5.0 (1.8–13.9) | 0.002 | ||
>6 |
283 (23) |
38 |
13.4 |
13.7 (5.3–35.3) |
<0.0001 |
6.4 (2.1–19.2) |
0.001 |
||
Previous travel destinations | |||||||||
Not Asia | 537 | 31 | 5.8 | 1 | |||||
Asia | 670 (56) | 47 | 7.0 | 1.2 (0.77–2.0) | 0.38 | ||||
Not Latin America | 661 | 22 | 3.3 | 1 | 1 | ||||
Latin America | 546 (45) | 56 | 10.3 | 3.3 (2.0–5.5) | <0.0001 | 1.6 (0.85–2.9) | 0.15 | ||
Not Africa | 679 | 41 | 6.0 | 1 | |||||
Africa |
528 (48) |
37 |
7.0 |
1.2 (0.74–1.9) |
0.50 |
||||
Primary purpose of current travel | <0.0001 | 0.001 | |||||||
Tourism | 1,032 (86) | 52 | 5.0 | 1 | 1 | ||||
Work or education | 99 (8) | 8 | 8.1 | 1.7 (0.76–3.6) | 0.20 | 1.3 (0.52–3.3) | 0.57 | ||
Visit with friends and/or relatives |
76 (6) |
18 |
23.7 |
5.8 (3.2–10.6) |
<0.0001 |
4.1 (2.0–8.5) |
<0.0001 |
||
Vaccination status | |||||||||
Not vaccinated for previous travel | 888 (74) | 46 | 5.2 | 1 | 1 | ||||
Vaccinated for previous travel | 319 (26) | 32 | 10.0 | 2.0 (1.3–3.3) | 0.003 | 1.0 (0.56–1.78) | 0.99 |
*DENV, dengue virus; PR, prevalence rate; PRR, prevalence rate ratio; CI, confidence interval; NA, not applicable; IQR, interquartile range.