{"id":6601,"date":"2016-02-03T00:00:00","date_gmt":"2016-02-03T05:00:00","guid":{"rendered":"https:\/\/icesontario.wpengine.com\/journal-articles\/assessment-of-the-effect-of-cold-and-hot-temperatures-on-mortality-in-ontario-canada-a-population-based-study\/"},"modified":"2023-06-14T20:03:40","modified_gmt":"2023-06-15T00:03:40","slug":"assessment-of-the-effect-of-cold-and-hot-temperatures-on-mortality-in-ontario-canada-a-population-based-study","status":"publish","type":"journal_article","link":"https:\/\/www.ices.on.ca\/fr\/publications\/journal-articles\/assessment-of-the-effect-of-cold-and-hot-temperatures-on-mortality-in-ontario-canada-a-population-based-study\/","title":{"rendered":"Assessment of the effect of cold and hot temperatures on mortality in Ontario, Canada: a population-based study"},"content":{"rendered":"

Background<\/strong> — Ambient high temperature is associated with mortality; however, heat-related mortality risk has not been quantified systematically in Ontario, the largest province in Canada. Less is known about cold-related risk in this population. Our objective was to quantify the health impact from cold and hot temperatures in Ontario.<\/p>\n

Methods<\/strong> — This study comprised all residents of Ontario who died during 1996-2010. A case crossover analysis was applied to assess the relation between daily temperature fluctuation and deaths from non-accidental and selected causes in cold (December-February) and warm season (June-August), respectively, adjusting for various potential confounders. Risk estimates were obtained for each census division, and then pooled across Ontario. We examined potential effect modification for selected comorbidities and sociodemographic characteristics.<\/p>\n

Results<\/strong> — In warm season, each 5°<\/strong>C increase in daily mean temperature was associated with a 2.5% increase in non-accidental deaths (95% confidence interval (CI)=1.3%-3.8%) on the day of exposure (lag 0). In cold season, each 5°<\/strong>C decrease in daily temperature was associated with a 3.0% (95%CI=1.8%-4.2%) increase in non-accidental deaths, which persisted over seven days (lag 06). The cold-related effects (lag 06) were stronger for cardiovascular-related deaths (any cardiovascular: 4.1%; 95%CI=2.3-5.9% and ischemic heart: 5.8%; 95%CI=3.6%-8.1%), especially among individuals aged <65 years (8.0%; 95%CI=3.0%-13.0%). Conversely, heat most strongly increased respiratory-related deaths during hospitalization (26.0%; 95%CI=0-61.4%). Across Ontario, each 5°<\/strong>C change in daily temperature was estimated to induce 7 excess deaths per day in cold season and 4 excess deaths in warm season.<\/p>\n

Interpretation<\/strong> — Heat contributed to excess deaths in Ontario, although cold-related impact appeared greater. Further work is required to better define high-risk subgroups, which might include the homeless and individuals with inadequately-heated housing.<\/p>\n","protected":false},"excerpt":{"rendered":"

Background — Ambient high temperature is associated with mortality; however, heat-related mortality risk has not been quantified systematically in Ontario, the largest province in Canada. Less is known about cold-related risk in this population. Our objective was to quantify the health impact from cold and hot temperatures in Ontario. Methods — This study comprised all […]<\/p>\n","protected":false},"template":"","migration-helper-automated":[],"migration-manual":[],"topic":[40,42,52,35],"migration-helper-qa-sample-set":[],"class_list":["post-6601","journal_article","type-journal_article","status-publish","hentry","topic-cardiovascular-disease","topic-chronic-diseases-and-multimorbidity","topic-lung-health","topic-public-health"],"acf":{"citation":"Chen H, Wang J, Li Q, Yagouti A, Lavigne E, Foty R, Burnett RT, Villeneuve PJ, Cakmak S, Copes R. CMAJ Open<\/em>. 2016; 4(1):E48-58.","source_url":"https:\/\/www.ncbi.nlm.nih.gov\/pmc\/articles\/PMC4866918\/","ices_scientist":[1190,1117,16884],"site":[6735],"research_program":[],"news_release":[7667],"journal_article":[],"atlas":[],"research_report":[],"infographic":[],"video":[],"downloads":null,"links":null,"sitecore_item_id":"2331DE73-7D89-4266-BAB5-CEF24876D9F1","sitecore_item_name":"Assessment-of-the-effect-of-cold-and-hot-temperatures-on-mortality-in-Ontario","sitecore_field_values":"{\n \"__Valid from\": \"20170811T140843\",\n \"Content\": null,\n \"Title\": \"Assessment of the effect of cold and hot temperatures on mortality in Ontario, Canada: a population-based study\",\n \"Short title\": \"Assessment of the effect of cold\",\n \"Summary\": \"The researchers objective was to quantify the health impact from cold and hot temperatures in Ontario.\",\n \"Citation\": \"

Chen H, Wang J, Li Q, Yagouti A, Lavigne E, Foty R, Burnett RT, Villeneuve PJ, Cakmak S, Copes R. CMAJ Open<\/em>. 2016; 4(1):E48-58.<\/p>\",\n \"Abstract\": \"

Background<\/strong> — Ambient high temperature is associated with mortality; however, heat-related mortality risk has not been quantified systematically in Ontario, the largest province in Canada. Less is known about cold-related risk in this population. Our objective was to quantify the health impact from cold and hot temperatures in Ontario.<\/p>n

Methods<\/strong> — This study comprised all residents of Ontario who died during 1996-2010. A case crossover analysis was applied to assess the relation between daily temperature fluctuation and deaths from non-accidental and selected causes in cold (December-February) and warm season (June-August), respectively, adjusting for various potential confounders. Risk estimates were obtained for each census division, and then pooled across Ontario. We examined potential effect modification for selected comorbidities and sociodemographic characteristics.<\/p>n

Results<\/strong> — In warm season, each 5°<\/strong>C increase in daily mean temperature was associated with a 2.5% increase in non-accidental deaths (95% confidence interval (CI)=1.3%-3.8%) on the day of exposure (lag 0). In cold season, each 5°<\/strong>C decrease in daily temperature was associated with a 3.0% (95%CI=1.8%-4.2%) increase in non-accidental deaths, which persisted over seven days (lag 06). The cold-related effects (lag 06) were stronger for cardiovascular-related deaths (any cardiovascular: 4.1%; 95%CI=2.3-5.9% and ischemic heart: 5.8%; 95%CI=3.6%-8.1%), especially among individuals aged <65 years (8.0%; 95%CI=3.0%-13.0%). Conversely, heat most strongly increased respiratory-related deaths during hospitalization (26.0%; 95%CI=0-61.4%). Across Ontario, each 5°<\/strong>C change in daily temperature was estimated to induce 7 excess deaths per day in cold season and 4 excess deaths in warm season.<\/p>n

Interpretation<\/strong> — Heat contributed to excess deaths in Ontario, although cold-related impact appeared greater. Further work is required to better define high-risk subgroups, which might include the homeless and individuals with inadequately-heated housing.<\/p>n

View full text<\/a><\/p>\",\n \"Keywords\": \"{92E2791D-5DAB-4244-8A85-434D524D9A12}|{A5B64F05-E7A9-445C-B556-00C7408761F8}|{A3C3BA7B-3DD2-4E8B-9A23-F71AAB03A06D}|{128D8B1B-1143-4080-9185-2C8A3C4BDC30}\",\n \"Related Products\": \"

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