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ORIGINAL RESEARCH article

Front. Public Health
Sec. Environmental Health and Exposome
Volume 12 - 2024 | doi: 10.3389/fpubh.2024.1454097
This article is part of the Research Topic Impact of Environmental Factors on the Health of Children and Older Adults View all articles

Daily diurnal temperature range associated with emergency ambulance calls: a nine-year time-series study

Provisionally accepted
Keke Cai Keke Cai Gao Chen Gao Chen Jin Wang Jin Wang Jie Zeng Jie Zeng Xiaoqing Huang Xiaoqing Huang *
  • Guangdong Second Provincial General Hospital, Guangzhou, Guangdong, China

The final, formatted version of the article will be published soon.

    Background: Diurnal temperature range (DTR) is associated with the increased risk of morbidity and mortality. However, the relationship between DTR and emergency ambulance calls (EACs), which more accurately and immediately reflect the health impacts of temperature changes, remains underexplored in China.We collected daily data on EACs and meteorological factors from 2009 to 2017 in Guangzhou, China. DTR, representing the temperature range within a day, was calculated by subtracting the minimum temperature from the maximum temperature for each day. Generalized additive models were used to estimate the association between DTR and EACs for all-cause, cardiovascular diseases, and respiratory diseases. Additionally, subgroup and sensitivity analyses were conducted in our study.We found significant associations between daily DTR and EACs. The excess risks (ERs) were 0.47% (95% CI: 0.14%, 0.81%) for all-cause EACs, 0.94% (95% CI: 0.46%, 1.43%) for cardiovascular-related EACs, and 1.31% (95% CI: 0.76%, 1.86%) for respiratory -related EACs at lag01, respectively. Subgroup analyses indicated that these associations were notably stronger among the older, males, and during the warm season. Specifically, there was an increase of 1.16% (95% CI: 0.59%, 1.74%) in cardiovascular-related EACs among the elderly, compared to 0.45% (95% CI: -0.21%, 1.12%) among those younger than 65 years. Among males, the increase was 1.39% (95% CI: 0.79%, 1.99%), compared to 0.13% (95% CI: -0.53%, 0.79%) among females. During the warm season, the increase was 1.53% (95% CI: 0.74%, 2.34%), compared to 0.75% (95% CI: 0.14%, 1.37%) during the cold season.Conclusions: DTR might increase the risk of daily all-cause, cardiovascular-related, and respiratory-related EACs in Guangzhou, China. The associations were particularly strong among older adults, males, and during the warm season.Implementing public health policies is essential to mitigate the adverse health effects of DTR.

    Keywords: Emergency ambulance calls, China, diurnal temperature range, timeseries analysis, Generalized additive models (GAMs)

    Received: 24 Jun 2024; Accepted: 27 Aug 2024.

    Copyright: © 2024 Cai, Chen, Wang, Zeng and Huang. This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) or licensor are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.

    * Correspondence: Xiaoqing Huang, Guangdong Second Provincial General Hospital, Guangzhou, 510317, Guangdong, China

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