WANG Qing-an, ZHANG Hui-ling, YANG Yi, ZHANG Yin-e, XIE Fan, ZHAO Yu, ZHAO Yi, SANG Jian-ren, ZHANG Yu-long, ZHANG Ya-juan, ZHANG Yu-hong. Relationships of different temperature indices with non-accidental mortality of residents in fve cities of Ningxia[J]. Journal of Environmental and Occupational Medicine, 2018, 35(2): 148-153. DOI: 10.13213/j.cnki.jeom.2018.17486
Citation: WANG Qing-an, ZHANG Hui-ling, YANG Yi, ZHANG Yin-e, XIE Fan, ZHAO Yu, ZHAO Yi, SANG Jian-ren, ZHANG Yu-long, ZHANG Ya-juan, ZHANG Yu-hong. Relationships of different temperature indices with non-accidental mortality of residents in fve cities of Ningxia[J]. Journal of Environmental and Occupational Medicine, 2018, 35(2): 148-153. DOI: 10.13213/j.cnki.jeom.2018.17486

Relationships of different temperature indices with non-accidental mortality of residents in fve cities of Ningxia

  • Objective To evaluate the relationships of different temperature indices with non-accidental mortality of residents in five cities of Ningxia.

    Methods Daily mortality and meteorological data in five cities of Ningxia were collected from January 1, 2010 to December 31, 2015. A generalized linear model combined with a distributed lag non-linear model was used to estimate the relationships of different temperature indices with non-accidental mortality.

    Results The median of daily temperature in selected five cities of Ningxia ranged from 9.1 to 12.6℃. The median of intraday temperature change was higher than interday temperature change in all the five cities. Whether in hot days (when the average temperature was higher than that of minimum mortality temperature) or cold days (when the average temperature was lower than minimum mortality temperature), Zhongwei City showed the largest intraday temperature change (hot days, 13.8℃; cold days, 13.5℃). There was a V-shaped or J-shaped relationship between daily average temperature and non-accidental mortality in selected cities of Ningxia. Extreme cold (P1 of temperature) was associated with increased risks of non-accidental mortality in Yinchuan City, Shizuishan City, and Guyuan City, with RR (95% CI) of 1.69(1.31-2.19), 2.03(1.04-3.93), and 2.16(1.53-3.04), respectively. While extreme heat (P99 of temperature) was associated with increased risks of non-accidental mortality in Wuzhong City, with RR (95% CI) of 2.49 (1.20-5.14). Elevated intraday temperature change on hot days increased the non-accidental mortality in Yinchuan City (RR:1.06; 95% CI:1.01-1.11). No effect of the variation of interday temperature change on non-accidental mortality was found.

    Conclusion Compared with intraday temperature change and interday temperature change, extreme daily average temperatures are associated with increased non-accidental mortality of residents in Ningxia.

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