Seasonal changes in mortality rates from main causes of death in Japan

Shigeyuki Nakaji, Stefano Parodi, Vincenzo Fontana, Takashi Umeda, Katsuhiko Suzuki, Juichi Sakamoto, Shinsaku Fukuda, Seiko Wada, Kazuo Sugawara

Research output: Contribution to journalArticlepeer-review

99 Citations (Scopus)


Background: It is well recognized that the season of the year exerts an influence on some diseases and causes of death such as coronary heart diseases, stroke, infectious diseases and so on. Methods: We evaluated the influence of seasonal changes on diseases and causes of death in Japan using the Japan Vital Statistics from 1970 to 1999 and recorded weather data (mean temperature), by a Fourier decomposition in a log linear regression model. Results: Major influences of seasonal change with the highest rates in winter were seen on the following: the overall causes of death; infectious and parasitic diseases including tuberculosis; respiratory disease, including pneumonia and influenza; heart and cerebrovascular diseases; diabetes; and digestive diseases and accidents. Two peaks were seen in suicides, a large peak in April and a small peak in autumn. Cancer and homicides were little or not at all influenced by seasonality. There was no major difference in changes between the years studied, except for respiratory disease and tuberculosis, which showed a clear reduction in the seasonality effect from 1970 to 1999. Conclusions: To reduce the overall mortality rate and to prolong life expectancy in Japan, measures must be taken to reduce those mortality rates associated with seasonal differences, especially those causes of death which show a strong correlation with seasonal change: respiratory, heart, cerebrovascular, diabetes and infectious diseases.

Original languageEnglish
Pages (from-to)905-913
Number of pages9
JournalEuropean Journal of Epidemiology
Issue number10
Publication statusPublished - 2004 Oct
Externally publishedYes


  • Cause of death
  • Japan
  • Mortality
  • Seasonal Change
  • Vital statistics

ASJC Scopus subject areas

  • Epidemiology


Dive into the research topics of 'Seasonal changes in mortality rates from main causes of death in Japan'. Together they form a unique fingerprint.

Cite this