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Disparities in the association between ambient temperature and preterm birth according to individual and regional characteristics: a nationwide time-stratified case-crossover study

Title
Disparities in the association between ambient temperature and preterm birth according to individual and regional characteristics: a nationwide time-stratified case-crossover study
Authors
MinJieunLeeWhanheeOhJongminKwagYoungrinKimEunjiJoyce MaryKyung AHaEunhee
Ewha Authors
하은희곽영린이경아
SCOPUS Author ID
하은희scopus; 곽영린scopus; 이경아scopus
Issue Date
2024
Journal Title
Environmental Health: A Global Access Science Source
ISSN
1476-069XJCR Link
Citation
Environmental Health: A Global Access Science Source vol. 23, no. 1
Keywords
Ambient temperatureDisparityGreennessMedical resourcesPreterm birthUrbanicity
Publisher
BioMed Central Ltd
Indexed
SCIE; SCOPUS WOS scopus
Document Type
Article
Abstract
Background: Several studies have reported that climate change elevates heat exposure in pregnant women and high temperatures during pregnancy are associated with preterm births (PTBs). Although the association might be disproportionate, related evidence remains sparse. We evaluated the disproportionate risk of PTB associated with ambient temperature during pregnancy by individual and regional characteristics in South Korea. Methods: We collected data on birth certificates and daily mean temperatures during the period from 2011 to 2019. A time-stratified case-crossover design was used to investigate the association between temperature and PTB and stratified analyses were conducted to examine the effect modification of individual and regional characteristics. Results: A total of 160,067 singleton PTBs were recorded in Korea from 2011 to 2019. A 5℃ increase in the mean temperature during the last four weeks before delivery was associated with an increased risk of PTB with an odds ratio (OR) of 1.03 (95% confidence interval [CI]: 1.02, 1.05), and the association was more evident in mothers aged ≥35 years (OR: 1.06 [95% CI: 1.03, 1.10]) and with low education levels (OR: 1.04 [95% CI: 1.02, 1.05]). Additionally, the estimated risk was evident in districts with lower medical resources and more prominent disparities were shown by individual and regional characteristics in rural areas than in urban areas. Conclusions: This study provides evidence that the risk of PTB related to ambient temperature is disproportionate by individual and regional characteristics and suggests the need for public health policies to alleviate the disparities, especially in rural areas. © The Author(s) 2024.
DOI
10.1186/s12940-024-01062-6
Appears in Collections:
의과대학 > 의학과 > Journal papers
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