4.7 Article

The effects of high temperature on cardiovascular admissions in the most populous tropical city in Vietnam

Journal

ENVIRONMENTAL POLLUTION
Volume 208, Issue -, Pages 33-39

Publisher

ELSEVIER SCI LTD
DOI: 10.1016/j.envpol.2015.06.004

Keywords

Temperature; Hospital admission; Cardiovascular diseases; Ho Chi Minh City; Vietnam

Funding

  1. Griffith University
  2. Commonwealth Scientific and Industrial Research Organization (CSRIRO)

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This study examined the short-term effects of temperature on cardiovascular hospital admissions (CHA) in the largest tropical city in Southern Vietnam. We applied Poisson time-series regression models with Distributed Lag Non-Linear Model (DLNM) to examine the temperature-CHA association while adjusting for seasonal and long-term trends, day of the week, holidays, and humidity. The threshold temperature and added effects of heat waves were also evaluated. The exposure-response curve of temperature-CHA reveals a J-shape relationship with a threshold temperature of 29.6 degrees C The delayed effects temperature-CHA lasted for a week (0-5 days). The overall risk of CHA increased 12.9% (RR, 1.129; 95%CI, 0.972-1.311) during heatwave events, which were defined as temperature >= the 99th percentile for >= 2 consecutive days. The modification roles of gender and age were inconsistent and non-significant in this study. An additional prevention program that reduces the risk of cardiovascular disease in relation to high temperatures should be developed. (C) 2015 Elsevier Ltd. All rights reserved.

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