High-temperature indices associated with mortality and outpatient visits: Characterizing the association with elevated temperature
In: Science of the Total Environment, Jg. 427-428 (2012-06-15), S. 41-49
academicJournal
Zugriff:
Abstract: This study aimed to identify optimal high-temperature indices to predict risks of all-cause mortality and outpatient visits for subtropical islanders in warm seasons (May to October). Eight high-temperature indices, including three single measurements (average, maximum and minimum temperature) and five composite indices (heat index, humidex, temperature humidity index, apparent temperature and wet-bulb globe temperature), and their standardized Z scores, were used in distributed lag non-linear models. Cumulative 8-day (lag zero to seven days) relative risks (RRs) and 95% confidence intervals were estimated, 1 and 2 standardized deviations above the medium (i.e., at 84.1th and 97.7th percentile, respectively), by comparing with Z scores for the lowest risks of mortality and outpatient visits as references. Analyses were performed for Taipei in north, Central Taiwan and Southern Taiwan. Results showed that standardized Z-values of high-temperature indices associated with the lowest health risk were approximately 0 in Taipei and Central Taiwan, and −1 in Southern Taiwan. As the apparent temperature was at Z=2, the cumulative 8-day mortality risk increased significantly, by 23% in Taipei and 28% in Southern Taiwan, but not in Central Taiwan. The maximum temperature displayed consistently a high correlation with all-cause outpatient visits at Z=1; with the cumulative 8-day RRs for outpatient visits increased by 7%, 3%, and 4% in the three corresponding areas. In conclusion, this study has demonstrated methods to compare multiple high-temperature indices associated with all-cause mortality and outpatient visits for population residing in a subtropical island. Apparent temperature is an optimal indicator for predicting all-cause mortality risk, and maximum temperature is recommended to associate with outpatient visits. The impact of heat varied with study areas, evaluated health outcomes, and high-temperature indices. The increased extreme heat is associated with stronger risk for all-cause mortality than for outpatient visits. [Copyright &y& Elsevier]
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High-temperature indices associated with mortality and outpatient visits: Characterizing the association with elevated temperature
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Autor/in / Beteiligte Person: | Lin, Yu-Kai ; Chang, Chin-Kuo ; Li, Ming-Hsu ; Wu, Yu-Chung ; Wang, Yu-Chun |
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Zeitschrift: | Science of the Total Environment, Jg. 427-428 (2012-06-15), S. 41-49 |
Veröffentlichung: | 2012 |
Medientyp: | academicJournal |
ISSN: | 0048-9697 (print) |
DOI: | 10.1016/j.scitotenv.2012.04.039 |
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