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 » 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 NEXT ON HEALTH24X Call for potential donors as Cape blood stocks run low 2017-06-20 14:59 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 A new way to diagnose food allergies Medical SEE: Every 4 seconds a new case of this disease is diagnosed Lifestyle Do e-cigarettes damage blood vessels? Lifestyle Why too many vitamins might harm you Lifestyle Get to know your darker skin needs Parenting Here's why all children should be secured when travelling by car From our sponsors R2000 Skin Renewal online store voucher up for grabs! Dementia and Incontinence: what you need to know 8 strategies for treating both your bladder problems and your depression Symptoms differ from person to person, identifying what triggers your IBS Live healthier Beware! » 7 steps for surviving the flu 'I nearly died at an Adele concert’ How to tell if your doctor's a quack Your health is precious, so you need to be sure your doctor's the real deal. Bathroom etiquette » Less salt may lead to fewer nighttime bathroom trips SEE: 9 more funny bathroom signs Which office bathroom habits are the most important? Can you maintain your professionalism in your bathroom cubicle?