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Cold Spells and Cause-Specific Mortality in 47 Japanese Prefectures: A Systematic Evaluation.

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Title: Cold Spells and Cause-Specific Mortality in 47 Japanese Prefectures: A Systematic Evaluation.
Authors: Chaochen Ma1, Jun Yang2, Nakayama, Shoji F.1, Iwai-Shimada, Miyuki1, Chau-Ren Jung1, Xian-Liang Sun1, Honda, Yasushi3 honda.yasushi.fn@u.tsukuba.ac.jp
Source: Environmental Health Perspectives. Jun2021, Vol. 129 Issue 6, p067001-1-067001-10. 10p.
Subject Terms: *Environmental health, *Public health, Asthma-related mortality, Mortality risk factors, Pneumonia-related mortality, Cold (Temperature), Mortality, Risk assessment, Statistical models, Research funding, Myocardial ischemia, Frail elderly, Pulmonary emphysema, Causes of death, Descriptive statistics, Meta-analysis, Respiratory diseases, Obstructive lung diseases, Cerebrovascular disease, Cerebral infarction, Data analysis software, Kidney diseases, Confidence intervals, Regression analysis, Nosology, Cerebral hemorrhage
Geographic Terms: Japan
Abstract: BACKGROUND: Many studies have investigated the devastating health effects of heat waves, but less is known about health risks related to cold spells, despite evidence that extreme cold may contribute to a larger proportion of deaths. OBJECTIVES: We aimed to systematically investigate the association between cold spells and mortality in Japan. METHODS: Daily data for weather conditions and 12 common causes of death during the 1972–2015 cold seasons (November–March) were obtained from 47 Japanese prefectures. Cold spells were defined as =2 consecutive days with daily mean temperatures =5th percentile for the cold season in each prefecture. Quasi-Poisson regression was combined with a distributed lag model to estimate prefecture-specific associations, and pooled associations at the national level were obtained through random-effects meta-analysis. The potential influence of cold spell characteristics (intensity, duration, and timing in season) on associations between cold spells and mortality was examined using a similar two-stage approach. Temporal trends were investigated using a meta-regression model. RESULTS: A total of 18,139,498 deaths were recorded during study period. Mortality was significantly higher during cold spell days vs. other days for all selected causes of death. Mortality due to age-related physical debilitation was more strongly associated with cold spells than with other causes of death. Associations between cold spells and mortality from all causes and several more specific outcomes were stronger for longer and more intense cold spells and for cold spells earlier in the cold season. However, although all outcomes were positively associated with cold spell duration, findings for cold spell intensity and seasonal timing were heterogeneous across the outcomes. Associations between cold spells and mortality due to cerebrovascular disease, cerebral infarction, and age-related physical debility decreased in magnitude over time, whereas temporal trends were relatively flat for all-cause mortality and other outcomes. DISCUSSION: Our findings may have implications for establishing tailored public health strategies to prevent avoidable cold spell–related health consequences. [ABSTRACT FROM AUTHOR]
Copyright of Environmental Health Perspectives is the property of National Institute of Environmental Health Sciences and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
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  Data: Cold Spells and Cause-Specific Mortality in 47 Japanese Prefectures: A Systematic Evaluation.
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  Data: <searchLink fieldCode="AR" term="%22Chaochen+Ma%22">Chaochen Ma</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Jun+Yang%22">Jun Yang</searchLink><relatesTo>2</relatesTo><br /><searchLink fieldCode="AR" term="%22Nakayama%2C+Shoji+F%2E%22">Nakayama, Shoji F.</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Iwai-Shimada%2C+Miyuki%22">Iwai-Shimada, Miyuki</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Chau-Ren+Jung%22">Chau-Ren Jung</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Xian-Liang+Sun%22">Xian-Liang Sun</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Honda%2C+Yasushi%22">Honda, Yasushi</searchLink><relatesTo>3</relatesTo><i> honda.yasushi.fn@u.tsukuba.ac.jp</i>
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  Data: <searchLink fieldCode="JN" term="%22Environmental+Health+Perspectives%22">Environmental Health Perspectives</searchLink>. Jun2021, Vol. 129 Issue 6, p067001-1-067001-10. 10p.
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  Data: BACKGROUND: Many studies have investigated the devastating health effects of heat waves, but less is known about health risks related to cold spells, despite evidence that extreme cold may contribute to a larger proportion of deaths. OBJECTIVES: We aimed to systematically investigate the association between cold spells and mortality in Japan. METHODS: Daily data for weather conditions and 12 common causes of death during the 1972–2015 cold seasons (November–March) were obtained from 47 Japanese prefectures. Cold spells were defined as =2 consecutive days with daily mean temperatures =5th percentile for the cold season in each prefecture. Quasi-Poisson regression was combined with a distributed lag model to estimate prefecture-specific associations, and pooled associations at the national level were obtained through random-effects meta-analysis. The potential influence of cold spell characteristics (intensity, duration, and timing in season) on associations between cold spells and mortality was examined using a similar two-stage approach. Temporal trends were investigated using a meta-regression model. RESULTS: A total of 18,139,498 deaths were recorded during study period. Mortality was significantly higher during cold spell days vs. other days for all selected causes of death. Mortality due to age-related physical debilitation was more strongly associated with cold spells than with other causes of death. Associations between cold spells and mortality from all causes and several more specific outcomes were stronger for longer and more intense cold spells and for cold spells earlier in the cold season. However, although all outcomes were positively associated with cold spell duration, findings for cold spell intensity and seasonal timing were heterogeneous across the outcomes. Associations between cold spells and mortality due to cerebrovascular disease, cerebral infarction, and age-related physical debility decreased in magnitude over time, whereas temporal trends were relatively flat for all-cause mortality and other outcomes. DISCUSSION: Our findings may have implications for establishing tailored public health strategies to prevent avoidable cold spell–related health consequences. [ABSTRACT FROM AUTHOR]
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  Data: <i>Copyright of Environmental Health Perspectives is the property of National Institute of Environmental Health Sciences and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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RecordInfo BibRecord:
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    Identifiers:
      – Type: doi
        Value: 10.1289/EHP7109
    Languages:
      – Code: eng
        Text: English
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        PageCount: 10
        StartPage: 067001-1
    Subjects:
      – SubjectFull: Environmental health
        Type: general
      – SubjectFull: Public health
        Type: general
      – SubjectFull: Asthma-related mortality
        Type: general
      – SubjectFull: Mortality risk factors
        Type: general
      – SubjectFull: Pneumonia-related mortality
        Type: general
      – SubjectFull: Cold (Temperature)
        Type: general
      – SubjectFull: Mortality
        Type: general
      – SubjectFull: Risk assessment
        Type: general
      – SubjectFull: Statistical models
        Type: general
      – SubjectFull: Research funding
        Type: general
      – SubjectFull: Myocardial ischemia
        Type: general
      – SubjectFull: Frail elderly
        Type: general
      – SubjectFull: Pulmonary emphysema
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      – SubjectFull: Causes of death
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      – SubjectFull: Meta-analysis
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      – SubjectFull: Obstructive lung diseases
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      – SubjectFull: Kidney diseases
        Type: general
      – SubjectFull: Confidence intervals
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      – SubjectFull: Nosology
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      – SubjectFull: Cerebral hemorrhage
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      – SubjectFull: Japan
        Type: general
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      – TitleFull: Cold Spells and Cause-Specific Mortality in 47 Japanese Prefectures: A Systematic Evaluation.
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              Text: Jun2021
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