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International Journal of Biometeorology

, Volume 60, Issue 8, pp 1135–1142 | Cite as

Daily ambient temperature and renal colic incidence in Guangzhou, China: a time-series analysis

  • Changyuan Yang
  • Xinyu Chen
  • Renjie ChenEmail author
  • Jing Cai
  • Xia Meng
  • Yue Wan
  • Haidong KanEmail author
Original Paper

Abstract

Few previous studies have examined the association between temperature and renal colic in developing regions, especially in China, the largest developing country in the world. We collected daily emergency ambulance dispatches (EADs) for renal colic from Guangzhou Emergency Center from 1 January 2008 to 31 December 2012. We used a distributed-lag nonlinear model in addition to the over-dispersed generalized additive model to investigate the association between daily ambient temperature and renal colic incidence after controlling for seasonality, humidity, public holidays, and day of the week. We identified 3158 EADs for renal colic during the study period. This exposure-response curve was almost flat when the temperature was low and moderate and elevated when the temperature increased over 21 °C. For heat-related effects, the significant risk occurred on the concurrent day and diminished until lag day 7. The cumulative relative risk of hot temperatures (90th percentile) and extremely hot temperatures (99th percentile) over lag days 0–7 was 1.92 (95 % confidence interval, 1.21, 3.05) and 2.45 (95 % confidence interval, 1.50, 3.99) compared with the reference temperature of 21 °C. This time-series analysis in Guangzhou, China, suggested a nonlinear and lagged association between high outdoor temperatures and daily EADs for renal colic. Our findings might have important public health significance to prevent renal colic.

Keywords

Temperature Renal colic Emergency ambulance dispatches Time series Epidemiology 

Notes

Acknowledgments

The study was supported by the Public Welfare Research Program of National Health and Family Planning Commission of China (201502003), National Natural Science Foundation of China (81222036), China Medical Board Collaborating Program (13-152), and Cyrus Tang Foundation (CTF-FD2014001).

Compliance with ethical standards

Conflict of interest

The authors declare that they have no competing interests.

Supplementary material

484_2015_1106_MOESM1_ESM.docx (16 kb)
ESM 1 (DOCX 16 kb)
484_2015_1106_MOESM2_ESM.docx (50 kb)
ESM 2 (DOCX 50 kb)

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Copyright information

© ISB 2015

Authors and Affiliations

  1. 1.School of Public Health, Key Lab of Public Health Safety of the Ministry of Education, and Key Lab of Health Technology Assessment of the Ministry of HealthFudan UniversityShanghaiChina
  2. 2.State Key Laboratory of Respiratory Disease, Guangzhou Institute of Respiratory Disease, The First Affiliated HospitalGuangzhou Medical UniversityGuangzhouChina
  3. 3.Division of Environment and Health Management, Department of Science, Technology and StandardsMinistry of Environmental Protection of PRCBeijingChina

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