The impact of heat, cold, and heat waves on hospital admissions in eight cities in Korea

Ji Young Son, Michelle L. Bell, Jong Tae Lee

Research output: Contribution to journalArticle

36 Citations (Scopus)

Abstract

Although the impact of temperature on mortality is well documented, relatively fewer studies have evaluated the associations of temperature with morbidity outcomes such as hospital admissions, and most studies were conducted in North America or Europe. We evaluated weather and hospital admissions including specific causes (allergic disease, asthma, selected respiratory disease, and cardiovascular disease) in eight major cities in Korea from 2003 to 2008. We also explored potential effect modification by individual characteristics such as sex and age. We used hierarchical modeling to first estimate city-specific associations between heat, cold, or heat waves and hospitalizations, and then estimated overall effects. Stratified analyses were performed by cause of hospitalization, sex, and age (0-14, 15-64, 65-74, and ≥75 years). Cardiovascular hospitalizations were significantly associated with high temperature, whereas hospitalizations for allergic disease, asthma, and selected respiratory disease were significantly associated with low temperature. The overall heat effect for cardiovascular hospitalization was a 4.5% (95% confidence interval 0.7, 8.5%) increase in risk comparing hospitalizations at 25 to 15 °C. For cold effect, the overall increase in risk of hospitalizations comparing 2 with 15 °C was 50.5 (13.7, 99.2%), 43.6 (8.9, 89.5%), and 53.6% (9.8, 114.9%) for allergic disease, asthma, and selected respiratory disease, respectively. We did not find statistically significant effects of heat waves compared with nonheat wave days. Our results suggest susceptible populations such as women and younger persons. Our findings provide suggestive evidence that both high and low ambient temperatures are associated with the risk of hospital admissions, particularly in women or younger person, in Korea.

Original languageEnglish
Pages (from-to)1893-1903
Number of pages11
JournalInternational Journal of Biometeorology
Volume58
Issue number9
DOIs
Publication statusPublished - 2014 Nov 1
Externally publishedYes

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Infrared Rays
Korea
Hospitalization
Hot Temperature
respiratory disease
asthma
Temperature
Asthma
temperature
cardiovascular disease
morbidity
confidence interval
Weather
North America
city
heat wave
hospital
cold
effect
weather

ASJC Scopus subject areas

  • Medicine(all)

Cite this

The impact of heat, cold, and heat waves on hospital admissions in eight cities in Korea. / Son, Ji Young; Bell, Michelle L.; Lee, Jong Tae.

In: International Journal of Biometeorology, Vol. 58, No. 9, 01.11.2014, p. 1893-1903.

Research output: Contribution to journalArticle

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