Possible association between recent migration and hospitalisation for dengue in an urban population: A prospective case-control study in northern Vietnam
- Author:
Ataru Tsuzuki
;
Vu Trong Duoc
;
Toshihiko Sunahara
;
Motoi Suzuki
;
Nguyen Hoang Le
;
Yukiko Higa
;
Lay-Myint Yoshida
;
Futoshi Hasebe
;
Tran Vu Phong
;
Noboru Minakawa
- Publication Type:Journal Article
- From:Tropical Biomedicine
2014;31(4):698-708
- CountryMalaysia
- Language:English
-
Abstract:
A prospective case–control study was conducted in urban districts in Hanoi,
northern Vietnam to evaluate the effect of migration on the risk of hospitalisation for dengue
in a Vietnamese urban population. We enrolled laboratory-confirmed dengue patients aged
>18 years who were hospitalised in local hospitals in November and December 2010. Four
neighbourhood-matched controls for each case were recruited within a week of hospitalisation.
Sociodemographic data were collected by interviews, and the number of immature and adult
mosquitoes within household premises was counted by entomological survey. Matched-pair
analyses were conducted using conditional logistic regression models. Among 43 cases and
168 controls, 84% and 83% were migrants from rural areas, respectively. Although statistical
significance was marginal, recent migration (residing in study area for <5 years) independently
increased the risk of hospitalisation for dengue compared with inhabitants after controlling
for potential confounders (adjusted odds ratio [aOR] = 3.78; 95% confidence interval [CI] =
0.99–14.27), whereas longer-term migration (residing in study area for >6 years) did not
change the risk (aOR = 1.1; 95% CI = 0.30–4.05). Younger age (18–34 years) (aOR = 7.26; 95%
CI = 2.39–22.06) and higher adult Aedes aegypti infestation level within household premises
(aOR = 9.25; 95% CI = 1.68–51.09) were also independently associated with hospitalisation
for dengue. Recent migration from rural areas seems to increase the risk of hospitalisation for
dengue in urban populations in endemic areas. Further research including cohort study should
be done to confirm the impact of migration on the risk of dengue in urban areas.
- Full text:W020150601570420145221.pdf
