Short-term association between air temperature and mortality in seven cities in Norway: A time series analysis.

Vázquez Fernández, Liliana; Diz-Lois Palomares, Alfonso; Vicedo Cabrera, Ana M; Freiesleben De Blasio, Birgitte; Di Ruscio, Francesco; Wisløff, Torbjørn; Rao, Shilpa (2024). Short-term association between air temperature and mortality in seven cities in Norway: A time series analysis. (In Press). Scandinavian journal of public health, p. 14034948241233359. Sage 10.1177/14034948241233359

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BACKGROUND

The association between ambient air temperature and mortality has not been assessed in Norway. This study aimed to quantify for seven Norwegian cities (Oslo, Bergen, Stavanger, Drammen, Fredrikstad, Trondheim and Tromsø) the non-accidental, cardiovascular and respiratory diseases mortality burden due to non-optimal ambient temperatures.

METHODS

We used a historical daily dataset (1996-2018) to perform city-specific analyses with a distributed lag non-linear model with 14 days of lag, and pooled results in a multivariate meta-regression. We calculated attributable deaths for heat and cold, defined as days with temperatures above and below the city-specific optimum temperature. We further divided temperatures into moderate and extreme using cut-offs at the 1st and 99th percentiles.

RESULTS

We observed that 5.3% (95% confidence interval (CI) 2.0-8.3) of the non-accidental related deaths, 11.8% (95% CI 6.4-16.4) of the cardiovascular and 5.9% (95% CI -4.0 to 14.3) of the respiratory were attributable to non-optimal temperatures. Notable variations were found between cities and subgroups stratified by sex and age. The mortality burden related to cold dominated in all three health outcomes (5.1%, 2.0-8.1, 11.4%, 6.0-15.4, and 5.1%, -5.5 to 13.8 respectively). Heat had a more pronounced effect on the burden of respiratory deaths (0.9%, 0.2-1.0). Extreme cold accounted for 0.2% of non-accidental deaths and 0.3% of cardiovascular and respiratory deaths, while extreme heat contributed to 0.2% of non-accidental and to 0.3% of respiratory deaths.

CONCLUSIONS

Most of the burden could be attributed to the contribution of moderate cold. This evidence has significant implications for enhancing public-health policies to better address health consequences in the Norwegian setting.

Item Type:	Journal Article (Original Article)
Division/Institute:	04 Faculty of Medicine > Pre-clinic Human Medicine > Institute of Social and Preventive Medicine (ISPM)
UniBE Contributor:	Vicedo Cabrera, Ana Maria
Subjects:	600 Technology > 610 Medicine & health 300 Social sciences, sociology & anthropology > 360 Social problems & social services
ISSN:	1403-4948
Publisher:	Sage
Language:	English
Submitter:	Pubmed Import
Date Deposited:	05 Mar 2024 10:33
Last Modified:	02 Apr 2024 18:46
Publisher DOI:	10.1177/14034948241233359
PubMed ID:	38439134
Uncontrolled Keywords:	Climate Norway cardiovascular disease cold temperature heat temperatures mortality mortality risk assessment respiratory disease mortality
URI:	https://boris.unibe.ch/id/eprint/193790