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Please use this identifier to cite or link to this item: http://hdl.handle.net/1942/22570

Title: Mortality related to cold and heat. What do we learn from dairy cattle?
Authors: Cox, Bianca
Gasparrini, Antonio
Catry, Boudewijn
Delcloo, Andy
Bijnens, Esmée
Vangronsveld, Jaco
Nawrot, Tim
Issue Date: 2016
Citation: ENVIRONMENTAL RESEARCH, 149, p. 231-238
Abstract: Extreme temperatures are associated with increased mortality among humans. Because similar epidemiologic studies in animals may add to the existing evidence, we investigated the association between ambient temperature and the risk of mortality among dairy cattle. We used data on 87,108 dairy cow deaths in Belgium from 2006 to 2009, and we combined a case-crossover design with distributed lag non-linear models. Province-specific results were combined in a multivariate meta-analysis. Relative to the estimated minimum mortality temperature of 15.4 degrees C (75th percentile), the pooled cumulative relative risks over lag 0-25 days were 1.26 (95% CI: 1.11,1.42) for extreme cold (1st percentile, -3.5 degrees C), 1.35 (95% CI: 1.19, 1.54) for moderate cold (5th percentile, -0.3 degrees C), 1.09 (95% CI: 1.02,1.17) for moderate heat (95th percentile, 19.7 degrees C), and 1.26 (95% CI: 1.08; 1.48) for extreme heat (99th percentile, 22.6 degrees C). The temporal pattern of the temperature-mortality association was similar to that observed in humans, i.e. acute effects of heat and delayed and prolonged effects of cold. Seasonal analyses suggested that most of the temperature-related mortality, including cold effects, occurred in the warm season. Our study reinforces the evidence on the plausibility of causal effects in humans. (C) 2016 Published by Elsevier Inc.
Notes: [Cox, Bianca; Bijnens, Esmee; Vangronsveld, Jaco; Nawrot, Tim S.] Hasselt Univ, Ctr Environm Sci, Agoralaan Bldg D, B-3590 Diepenbeek, Belgium. [Gasparrini, Antonio] London Sch Hyg & Trop Med, Dept Social & Environm Hlth Res, London WC1, England. [Gasparrini, Antonio] LSHTM, Dept Med Stat, London, England. [Catry, Boudewijn] Sci Inst Publ Hlth WIV ISP, Publ Hlth & Surveillance, Brussels, Belgium. [Delcloo, Andy] Royal Meteorol Inst, Brussels, Belgium. [Nawrot, Tim S.] Leuven Univ, Dept Publ Hlth & Primary Care, Leuven, Belgium.
URI: http://hdl.handle.net/1942/22570
DOI: 10.1016/j.envres.2016.05.018
ISI #: 000378366000026
ISSN: 0013-9351
Category: A1
Type: Journal Contribution
Validation: ecoom, 2017
Appears in Collections: Research publications

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