Association between extreme heat and hospital admissions for cataract patients in Hefei, China

Jingui Xie, Yongjian Zhu, Yiming Fan, Linbo Xie, Ruijin Xie, Fengming Huang, Liqing Cao

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4 Scopus citations

Abstract

Cataract is the first cause of blindness and the major cause of visual impairment worldwide. Under conditions of global warming, researchers have begun to give attention to the influence of increasing temperature on cataract patients. Our paper aimed to investigate the association between extreme heat and hospital admissions for cataract in Hefei, China. Based on data from the New Rural Cooperative Medical System and National Meteorological Information Center, we used a generalized additive model and a distributed lag nonlinear model to examine the relationship between extreme heat and hospitalizations for cataract, with consideration of cumulative and lagged effects. When current mean temperature was above 28 °C, each 1 °C rise was associated with a 4% decrease in the number of cataract admissions (RR = 0.96, 95% CI = 0.94–0.98). The cumulative relative risk over 11 days of lag was the lowest, which indicated that every 1 °C increase in mean temperature above 28 °C was associated with a 19% decrease in the number of hospital admissions for cataract (RR = 0.81, 95% CI = 0.75–0.88). In subgroup analyses, the negative association between extreme heat and hospital admissions for cataract was stronger among patients who were not admitted to provincial-level hospitals. In conclusion, this paper found that extreme heat was negatively associated with cataract hospitalizations in Hefei, providing useful information for hospitals and policymakers.

Original languageEnglish
Pages (from-to)45381-45389
Number of pages9
JournalEnvironmental Science and Pollution Research
Volume27
Issue number36
DOIs
StatePublished - Dec 2020

Keywords

  • Cataract
  • Distributed lag nonlinear model
  • Extreme heat
  • Generalized additive model
  • Hospital admission

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