Environment International (May 2024)

Comparison for the effects of different components of temperature variability on mortality: A multi-country time-series study

  • Bo Wen,
  • Yao Wu,
  • Yuming Guo,
  • Antonio Gasparrini,
  • Shilu Tong,
  • Ala Overcenco,
  • Aleš Urban,
  • Alexandra Schneider,
  • Alireza Entezari,
  • Ana Maria Vicedo-Cabrera,
  • Antonella Zanobetti,
  • Antonis Analitis,
  • Ariana Zeka,
  • Aurelio Tobias,
  • Baltazar Nunes,
  • Barrak Alahmad,
  • Ben Armstrong,
  • Bertil Forsberg,
  • Shih-Chun Pan,
  • Carmen Íñiguez,
  • Caroline Ameling,
  • César De la Cruz Valencia,
  • Christofer Åström,
  • Danny Houthuijs,
  • Do Van Dung,
  • Dominic Royé,
  • Ene Indermitte,
  • Eric Lavigne,
  • Fatemeh Mayvaneh,
  • Fiorella Acquaotta,
  • Francesca de’Donato,
  • Shilpa Rao,
  • Francesco Sera,
  • Gabriel Carrasco-Escobar,
  • Haidong Kan,
  • Hans Orru,
  • Ho Kim,
  • Iulian-Horia Holobaca,
  • Jan Kyselý,
  • Joana Madureira,
  • Joel Schwartz,
  • Jouni J.K. Jaakkola,
  • Klea Katsouyanni,
  • Magali Hurtado Diaz,
  • Martina S. Ragettli,
  • Masahiro Hashizume,
  • Mathilde Pascal,
  • Micheline de Sousa Zanotti Stagliorio Coélho,
  • Nicolás Valdés Ortega,
  • Niilo Ryti,
  • Noah Scovronick,
  • Paola Michelozzi,
  • Patricia Matus Correa,
  • Patrick Goodman,
  • Paulo Hilario Nascimento Saldiva,
  • Raanan Raz,
  • Rosana Abrutzky,
  • Samuel Osorio,
  • Tran Ngoc Dang,
  • Valentina Colistro,
  • Veronika Huber,
  • Whanhee Lee,
  • Xerxes Seposo,
  • Yasushi Honda,
  • Yoonhee Kim,
  • Yue Leon Guo,
  • Michelle L. Bell,
  • Shanshan Li

Journal volume & issue
Vol. 187
p. 108712

Abstract

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Background: Temperature variability (TV) is associated with increased mortality risk. However, it is still unknown whether intra-day or inter-day TV has different effects. Objectives: We aimed to assess the association of intra-day TV and inter-day TV with all-cause, cardiovascular, and respiratory mortality. Methods: We collected data on total, cardiovascular, and respiratory mortality and meteorology from 758 locations in 47 countries or regions from 1972 to 2020. We defined inter-day TV as the standard deviation (SD) of daily mean temperatures across the lag interval, and intra-day TV as the average SD of minimum and maximum temperatures on each day. In the first stage, inter-day and intra-day TVs were modelled simultaneously in the quasi-Poisson time-series model for each location. In the second stage, a multi-level analysis was used to pool the location-specific estimates. Results: Overall, the mortality risk due to each interquartile range [IQR] increase was higher for intra-day TV than for inter-day TV. The risk increased by 0.59% (95% confidence interval [CI]: 0.53, 0.65) for all-cause mortality, 0.64% (95% CI: 0.56, 0.73) for cardiovascular mortality, and 0.65% (95% CI: 0.49, 0.80) for respiratory mortality per IQR increase in intra-day TV0–7 (0.9 °C). An IQR increase in inter-day TV0–7 (1.6 °C) was associated with 0.22% (95% CI: 0.18, 0.26) increase in all-cause mortality, 0.44% (95% CI: 0.37, 0.50) increase in cardiovascular mortality, and 0.31% (95% CI: 0.21, 0.41) increase in respiratory mortality. The proportion of all-cause deaths attributable to intra-day TV0–7 and inter-day TV0–7 was 1.45% and 0.35%, respectively. The mortality risks varied by lag interval, climate area, season, and climate type. Conclusions: Our results indicated that intra-day TV may explain the main part of the mortality risk related to TV and suggested that comprehensive evaluations should be proposed in more countries to help protect human health.

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