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 More in Lifestyle ACOS – the little known syndrome asthma sufferers need to know about 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 Partner Content The lighter side of dinner Medical Adult-onset asthma linked to heart and stroke risk Medical Zika may persist for months in newborns Medical Stress may have greater effect on younger women's hearts Parenting Is mental illness linked to childhood head injuries? Parenting What is causing my baby's colic and what can I do? From our sponsors Otrivin Menthol relieves sinus congestion Innovative hearing aids can now interact online Second Healthcare Innovation Summit set for Johannesburg Salomon introduces Speedcross 4 Live healthier Nutrition crisis! » Good nutrition on the job will give you the edge Nutrition labels on food encourage healthy choices Nutrition may be as big a challenge today as HIV/Aids was 15 years ago Many people in a large number of low and middle income countries now experience a 'double burden' of malnutrition. E-cigarettes less risky? » E-cigarettes not an acceptable alternative to most smokers UK health officials endorse e-cigarettes E-cigarettes less of a cancer risk than regular smokes A study indicates that smokers who switch to e-cigarettes reduce their exposure to cancer-causing chemicals.