Is Greater Temperature Change Within a Day Associated With Increased Emergency Hospital Admissions for Heart Failure?
- 1 September 2013
- journal article
- research article
- Published by Ovid Technologies (Wolters Kluwer Health) in Circulation: Heart Failure
- Vol. 6 (5), 930-935
- https://doi.org/10.1161/circheartfailure.113.000360
Abstract
Background—: Although the seasonal variation and the effect of cold temperature on heart failure (HF) morbidity have been well documented, it is unknown whether the temperature variation within a day, that is, diurnal temperature range (DTR), is an independent risk factor for HF. We hypothesized that large DTR might be a source of additional environmental stress and, therefore, a risk factor for HF exacerbation. We aimed to test the association between DTR and HF hospitalization and to examine the effect modifiers, such as age, sex, and season. Methods and Results—: We collected daily meteorologic data and emergency HF hospital admissions from 2000 to 2007 in Hong Kong. We used Poisson regression models to fit the relationship between daily DTR and emergency HF hospitalizations, after adjusting for the time trend, seasonality, mean temperature, humidity, and levels of outdoor air pollution. We confirmed the seasonal variation of HF with peak hospital admissions in winter in Hong Kong. The adverse effects of DTR on emergency HF admissions were observed on the current day and lasted for the following several days. Every 1°C increase of DTR at lag 0 corresponded to 0.86% (95% confidence interval, 0.31%–1.43%) increment of emergency hospital admissions for HF. DTR exhibited significantly greater effect in the cool season, and on female and elderly patients. Conclusions—: Greater temperature change within a day was associated with increased emergency hospital admissions for HF. Health policymakers and hospitals may want to take into account the increased demand of specific facilities for susceptive population in winter with greater daily temperature variations.This publication has 34 references indexed in Scilit:
- What are the costs of heart failure?EP Europace, 2011
- Air pollutants and health outcomes: Assessment of confounding by influenzaAtmospheric Environment, 2010
- Effects of ambient temperature on the incidence of myocardial infarctionHeart, 2009
- Current trends in heart failure readmission rates: analysis of medicare dataClinical Cardiology, 2009
- Public Health and Air Pollution in Asia (PAPA): A Multicity Study of Short-Term Effects of Air Pollution on MortalityEnvironmental Health Perspectives, 2008
- Season, Sex, Age, and Education as Modifiers of the Effects of Outdoor Air Pollution on Daily Mortality in Shanghai, China: The Public Health and Air Pollution in Asia (PAPA) StudyEnvironmental Health Perspectives, 2008
- Is diurnal temperature range a risk factor for acute stroke death?International Journal of Cardiology, 2007
- Particulate Air Pollution and Hospital Admissions for Congestive Heart Failure in Seven United States CitiesThe American Journal of Cardiology, 2006
- Effects of Heat Stress on Thermoregulatory Responses in Congestive Heart Failure PatientsCirculation, 2005
- Hospital Admissions for Heart DiseaseEpidemiology, 2004