Ecological Factors Linked to Dengue Fever in Vietnam
Author Information
Author(s): Pham Hau V, Doan Huong TM, Phan Thao TT, Tran Minh Nguyen N
Primary Institution: Institute of Hygiene and Epidemiology of Tay Nguyen
Hypothesis
This study sought to elucidate the linkage between climate factors, mosquito indices and dengue incidence.
Conclusion
The study found that mosquito and climate factors are key determinants of dengue fever in Vietnam.
Supporting Evidence
- Dengue cases peaked during the rainy season from July to October.
- Higher household and container indices were significantly associated with increased dengue incidence.
- Increased temperature, humidity, and rainfall were linked to higher dengue risk.
Takeaway
Dengue fever is more common when it rains a lot and when there are more mosquitoes around.
Methodology
Monthly data on dengue cases and mosquito larval indices were collected from 2004 to 2008, and associations were assessed using Poisson regression.
Potential Biases
There is a risk of overestimation of dengue cases due to the clinical case definition used.
Limitations
The study may overestimate dengue cases due to reliance on standard clinical definitions and potential underreporting from private health services.
Participant Demographics
The study was conducted in Dak Lak province, Vietnam, with a population of 1.74 million, including 30% ethnic minorities.
Statistical Information
P-Value
< 0.0001
Confidence Interval
1.81-1.93
Statistical Significance
p<0.0001
Digital Object Identifier (DOI)
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