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Acta Trop. 2015 Jan;141(Pt A):88-96. doi: 10.1016/j.actatropica.2014.10.005. Epub 2014 Oct 16.

Identification of the prediction model for dengue incidence in Can Tho city, a Mekong Delta area in Vietnam.

Author information

1
Centre for Environment and Population Health (CEPH), Griffith University, Brisbane, QLD, Australia; Health Environment Management Agency, Ministry of Health, Hà Nội, Vietnam. Electronic address: d.phung@griffith.edu.au.
2
Centre for Environment and Population Health (CEPH), Griffith University, Brisbane, QLD, Australia.
3
Commonwealth Scientific and Industrial Research Organisation (CSIRO), Clayton South, VIC, Australia.
4
Health Environment Management Agency, Ministry of Health, Hà Nội, Vietnam.

Abstract

The Mekong Delta is highly vulnerable to climate change and a dengue endemic area in Vietnam. This study aims to examine the association between climate factors and dengue incidence and to identify the best climate prediction model for dengue incidence in Can Tho city, the Mekong Delta area in Vietnam. We used three different regression models comprising: standard multiple regression model (SMR), seasonal autoregressive integrated moving average model (SARIMA), and Poisson distributed lag model (PDLM) to examine the association between climate factors and dengue incidence over the period 2003-2010. We validated the models by forecasting dengue cases for the period of January-December, 2011 using the mean absolute percentage error (MAPE). Receiver operating characteristics curves were used to analyze the sensitivity of the forecast of a dengue outbreak. The results indicate that temperature and relative humidity are significantly associated with changes in dengue incidence consistently across the model methods used, but not cumulative rainfall. The Poisson distributed lag model (PDLM) performs the best prediction of dengue incidence for a 6, 9, and 12-month period and diagnosis of an outbreak however the SARIMA model performs a better prediction of dengue incidence for a 3-month period. The simple or standard multiple regression performed highly imprecise prediction of dengue incidence. We recommend a follow-up study to validate the model on a larger scale in the Mekong Delta region and to analyze the possibility of incorporating a climate-based dengue early warning method into the national dengue surveillance system.

KEYWORDS:

Dengue incidence; Dengue outbreak; Mekong Delta; Prediction model; Vietnam

[Indexed for MEDLINE]

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