Hourly-scale associations between temperature change and emergency department visits for schizophrenia in Hefei, Anhui Province, China

LIU Jintao; YAN Junwei; WU Keyu; FAN Yinguang; SU Hong; CHENG Jian

doi:10.16462/j.cnki.zhjbkz.2025.01.011

Volume 29 Issue 1

Jan. 2025

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LIU Jintao, YAN Junwei, WU Keyu, FAN Yinguang, SU Hong, CHENG Jian. Hourly-scale associations between temperature change and emergency department visits for schizophrenia in Hefei, Anhui Province, China[J]. CHINESE JOURNAL OF DISEASE CONTROL & PREVENTION, 2025, 29(1): 67-73. doi: 10.16462/j.cnki.zhjbkz.2025.01.011

Citation:

LIU Jintao, YAN Junwei, WU Keyu, FAN Yinguang, SU Hong, CHENG Jian. Hourly-scale associations between temperature change and emergency department visits for schizophrenia in Hefei, Anhui Province, China[J]. CHINESE JOURNAL OF DISEASE CONTROL & PREVENTION, 2025, 29(1): 67-73. doi: 10.16462/j.cnki.zhjbkz.2025.01.011

Citation:

LIU Jintao, YAN Junwei, WU Keyu, FAN Yinguang, SU Hong, CHENG Jian. Hourly-scale associations between temperature change and emergency department visits for schizophrenia in Hefei, Anhui Province, China[J]. CHINESE JOURNAL OF DISEASE CONTROL & PREVENTION, 2025, 29(1): 67-73. doi: 10.16462/j.cnki.zhjbkz.2025.01.011

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Hourly-scale associations between temperature change and emergency department visits for schizophrenia in Hefei, Anhui Province, China

doi: 10.16462/j.cnki.zhjbkz.2025.01.011

LIU Jintao^{1, 2},
YAN Junwei³,
WU Keyu⁴,
FAN Yinguang^{1, 2},
SU Hong^{1, 2},
CHENG Jian^{1, 2, 5, 6
,
,}

1.
Department of Epidemiology and Biostatistics, School of Public Health, Anhui Medical University, Hefei 230032, China
2.
Anhui Province Key Laboratory of Major Autoimmune Disease, Hefei 230032, China
3.
Department of Science and Education, Hefei Fourth People′s Hospital, Hefei 230032, China
4.
Jiangbei District Center for Disease Prevention and Control (Jiangbei District Health Supervision Institute), Chongqing 400020, China
5.
The First Affiliated Hospital of Anhui Medical University North District, Hefei 230012, China
6.
Anhui Public Health Clinical Center, Hefei 230012, China

LIU Jintao, YAN Junwei, and WU Keyu contributed equally to this article

Funds:

National Natural Science Foundation of China 42105165

More Information

Corresponding author: CHENG Jian, E-mail: jiancheng_cchh@163.com
Received Date: 2024-08-10
Rev Recd Date: 2024-10-27

Available Online: 2025-02-11

Publish Date: 2025-01-10

Abstract

Abstract

Objective To investigate the hourly-scale association between ambient temperature changes and schizophrenia-related emergency department (ED) visits. Methods We conducted a retrospective analysis of ED visit records for schizophrenia at the Anhui Mental Health Centre from 1 March 2015 to 31 December 2019. Hour-by-hour temperature data at the city level of Hefei was extracted from the ERA5-Land dataset as an exposure. A time-stratified case-crossover design was used to explore the association between hourly-scale changes in temperature and schizophrenia emergencies, with subgroups analyzed by age and gender. Subgroup analyses were performed to explore potential effect modification by age and gender. Results A total of 12 423 ED events for schizophrenia were identified, averaging 0.31 events per hour. The exposure-response relationship curve revealed an increased risk of schizophrenia-related ED presentations with rising temperatures within a 23-hour exposure window. Peak effects were observed at the first and 15th hour post-exposure, with each 1 ℃ temperature increase associated with a 1.17% (95% CI: 0.42%-1.92%) and 1.26%(95% CI: 0.25%-2.29%) increase in ED visit risk, respectively. Further stratification by time of day revealed a significant association between a 1 ℃ temperature increase and a 5.61% (95% CI: 1.65%-9.74%) elevated risk of ED visits between 21:00 and 00:00. Notably, subgroup analyses found a stronger association between temperature increases and schizophrenia-related ED visits among women compared to men. Conclusions There is an hourly-scale association between temperature change and schizophrenia emergencies, with an elevated risk emerging within hours of a temperature increase. These results underscore the need for targeted interventions to mitigate the acute risks associated with heat exposure among individuals with schizophrenia, particularly during sensitive time windows and within vulnerable subpopulations.
- Temperature,
- Hourly-scale,
- Schizophrenia

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References(25)

References

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