Can daytime use of bed nets not treated with insecticide reduce the risk of dengue hemorrhagic fever among children in Vietnam?
The purpose of this study was to investigate the prevalence of bed net use and elucidate the effect of daytime bed net use on preventing dengue hemorrhagic fever (DHF) among children in Vietnam. We conducted a population-based cross-sectional survey and a matched case-control study in Khanh Hoa Province where not only some pre-schoolchildren but also some school children, who take a nap during lunch break prior to returning to school, used bed nets during the day. Among 36,901 children 2-10 years of age, most used untreated bed nets during the night (98.3%) compared with 8.4% during the day. The results of the case-control study, which defined 151 cases who were hospitalized with DHF in the provincial hospitals and 604 age-matched neighborhood controls, did not support our hypothesis that children using untreated bed nets during the day are less likely to be hospitalized with DHF (adjusted odds ratio = 0.56, 95% confidence interval = 0.23-1.39).
Institute of Tropical Medicine, Nagasaki University, Nagasaki 852-8523, Japan. atarutsuzuki@hotmail.com
Ataru
A
Tsuzuki
Vu Dinh
VD
Thiem
Motoi
M
Suzuki
Hideki
H
Yanai
Toru
T
Matsubayashi
Lay-Myint
LM
Yoshida
Le Huu
le H
Tho
Truong Tan
TT
Minh
Dang Duc
DD
Anh
Paul E
PE
Kilgore
Masahiro
M
Takagi
Koya
K
Ariyoshi
D000818:Animals; D002648:Child; D002675:Child, Preschool; D005191:Family Characteristics; D005260:Female; D006801:Humans; D008297:Male; D009032:Mosquito Control / Q000379:methods; D057147:Mosquito Nets; D012307:Risk Factors; D019595:Severe Dengue / Q000517:prevention & control*; D012959:Socioeconomic Factors