Home > Lifestyle > Ageing well > News 08 March 2013 Outdoor heat increases hospitalisation in elderly Outdoor heat is associated with a significantly increased risk of emergency hospitalisation for respiratory disorders in the elderly, says study. 0 iStock Sign up for the newsletter » Quiz How long will you live? » Ask DietDoc » Ask CyberDoc » GRAPHIC: This dermatologist gets rid of all kinds of zits Plastic surgery trend on arms Outdoor heat is associated with a significantly increased risk of emergency hospitalisation for respiratory disorders in the elderly, according to a large epidemiological study of more than 12.5 million Medicare beneficiaries. "While outdoor heat has been shown to increase respiratory mortality, evidence on the relationship between heat and respiratory hospitalisations has been less consistent," said lead author G. Brooke Anderson, PhD, postdoctoral fellow in the Department of Biostatistics at the Johns Hopkins Bloomberg School of Public Health. "In the largest population of the elderly yet studied, we found strong evidence that short-term exposure to outdoor heat increases the risk of hospitalisation for COPD and respiratory tract infections. This relationship was consistent for men and women and across all age groups studied."The findings were published online ahead of print publication in the American Thoracic Society's American Journal of Respiratory and Critical Care Medicine.How the study was doneThe study included 213 urban counties across the United States and more than 30% of the US population aged 65 or older. Data on Medicare emergency respiratory hospitalisations were obtained for the period 1999-2008, along with measurements of weather and air pollution. On average, respiratory hospitalisations increased 4.3% for each 10°F increase in daily mean summer temperature. This association, which was not changed by adjustments for air pollution, age, gender or seasonal trends in hospitalization rates and temperature, was strongest on the day of exposure to heat and remained elevated the day following exposure. The increased risk for heat-related hospitalisation was similar for COPD (4.7%) and respiratory tract infections (4.1%), and tended to be higher in counties where summers are typically mild.Clear and consistent evidenceEach 10°F increase in daily temperature translates to approximately 30 excess respiratory hospitalisations per day among the elderly in the 213 counties studied, with larger increases in temperature expected to result in more excess hospitalisations. "Our study provides clear and consistent evidence of a link between outdoor heat and hospitalisation for respiratory disease in the elderly," said senior author Dr. Roger D. Peng, associate professor in the Department of Biostatistics at the Johns Hopkins Bloomberg School of Public Health. "As the prevalence of respiratory conditions and the age of the population continue to increase and global temperatures continue to rise as a result of climate change, the risk of heat-related respiratory disease is also likely to increase." EurekAlert More in Lifestyle A healthy body equals a healthy brain More: Ageing wellNews advertisement Read Health24’s Comments Policy Comment on this story 0 comments Comments have been closed for this article. Logout Comment 0 characters remaining Share on Facebook Loading comments... Other news Medical Zika: profile of an enigmatic virus Medical SA’s patent laws are preventing treatment for thousands with breast cancer Medical Microcephaly: Zika virus highlights birth defect Medical Europe urged to 'act early' to prevent Zika spread Medical How goats’ milk is changing the lives of HIV positive children Medical Hotter conditions allow Zika mosquito to flourish From our sponsors Why probiotics are beneficial for IBS Hearing aids on a windy day? No problem! A step-by-step guide on how to do pelvic floor exercises correctly Live healthier Get rid of lice! » Toddler dies after DIY lice treatment Back-to-school head lice Comb out head lice 20 head lice myths debunked Head lice are tiny, wingless insects that live in human hair. They cannot fly, jump or swim and are spread by head-to-head contact. Check out this infographic to learn more. About gout » Treatment of Gout Signs and symptoms of gout What is Gout? Is your diet causing gout? Suffering from gout? There's a lot you can do to prevent this horribly painful condition. Start by cutting out these 14 foods.