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Mortality of Japanese Olympic athletes in 1964 Tokyo Olympic Games

OBJECTIVES: To compare the mortality of Japanese athletes in the 1964 Tokyo Olympic Games with that of the Japanese population, and to elucidate factors associated with their mortality. METHODS: We obtained from the Japan Sport Association study subjects’ biographical information, information on lif...

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Autores principales: Takeuchi, Taro, Kitamura, Yuri, Ishizuka, Soya, Yamada, Sachiko, Aono, Hiroshi, Kawahara, Takashi, Sobue, Tomotaka
Formato: Online Artículo Texto
Lenguaje:English
Publicado: BMJ Publishing Group 2021
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7816928/
https://www.ncbi.nlm.nih.gov/pubmed/33520254
http://dx.doi.org/10.1136/bmjsem-2020-000896
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author Takeuchi, Taro
Kitamura, Yuri
Ishizuka, Soya
Yamada, Sachiko
Aono, Hiroshi
Kawahara, Takashi
Sobue, Tomotaka
author_facet Takeuchi, Taro
Kitamura, Yuri
Ishizuka, Soya
Yamada, Sachiko
Aono, Hiroshi
Kawahara, Takashi
Sobue, Tomotaka
author_sort Takeuchi, Taro
collection PubMed
description OBJECTIVES: To compare the mortality of Japanese athletes in the 1964 Tokyo Olympic Games with that of the Japanese population, and to elucidate factors associated with their mortality. METHODS: We obtained from the Japan Sport Association study subjects’ biographical information, information on lifestyles and medical data. Missing data were obtained from online databases. Standardised mortality ratio (SMR) was calculated to compare athletes’ mortality with the Japanese population. Cox proportional hazards model was applied to estimate the HR for each category of body mass index (BMI), smoking history and handgrip strength. This analysis was limited to male athletes due to the small number of female athletes. RESULTS: Among 342 (283 men, 59 women) athletes, deaths were confirmed for 70 (64 men, 6 women) athletes between September 1964 and December 2017. Total person years was 15 974.8, and the SMR was 0.64 (95% CI 0.50 to 0.81). Multivariate analysis performed on 181 male athletes. Mortality was significantly higher for BMI≥25 kg/m(2) than for 21–23 kg/m(2) (HR: 3.03, 95% CI 1.01 to 9.07). We found no statistically significant associations between smoking history and mortality; the HR (95% CI) for occasional and daily smokers were 0.82 (0.26 to 2.57) and 1.30 (0.55 to 3.03) compared with never smokers. We also found no statistically significant associations between handgrip strength and mortality (P for trend: 0.51). CONCLUSION: Japanese athletes in the 1964 Tokyo Olympic Games lived longer than the Japanese population. BMI≥25 kg/m(2) was associated with higher mortality, but smoking history and handgrip strength were not associated with mortality.
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spelling pubmed-78169282021-01-28 Mortality of Japanese Olympic athletes in 1964 Tokyo Olympic Games Takeuchi, Taro Kitamura, Yuri Ishizuka, Soya Yamada, Sachiko Aono, Hiroshi Kawahara, Takashi Sobue, Tomotaka BMJ Open Sport Exerc Med Original Research OBJECTIVES: To compare the mortality of Japanese athletes in the 1964 Tokyo Olympic Games with that of the Japanese population, and to elucidate factors associated with their mortality. METHODS: We obtained from the Japan Sport Association study subjects’ biographical information, information on lifestyles and medical data. Missing data were obtained from online databases. Standardised mortality ratio (SMR) was calculated to compare athletes’ mortality with the Japanese population. Cox proportional hazards model was applied to estimate the HR for each category of body mass index (BMI), smoking history and handgrip strength. This analysis was limited to male athletes due to the small number of female athletes. RESULTS: Among 342 (283 men, 59 women) athletes, deaths were confirmed for 70 (64 men, 6 women) athletes between September 1964 and December 2017. Total person years was 15 974.8, and the SMR was 0.64 (95% CI 0.50 to 0.81). Multivariate analysis performed on 181 male athletes. Mortality was significantly higher for BMI≥25 kg/m(2) than for 21–23 kg/m(2) (HR: 3.03, 95% CI 1.01 to 9.07). We found no statistically significant associations between smoking history and mortality; the HR (95% CI) for occasional and daily smokers were 0.82 (0.26 to 2.57) and 1.30 (0.55 to 3.03) compared with never smokers. We also found no statistically significant associations between handgrip strength and mortality (P for trend: 0.51). CONCLUSION: Japanese athletes in the 1964 Tokyo Olympic Games lived longer than the Japanese population. BMI≥25 kg/m(2) was associated with higher mortality, but smoking history and handgrip strength were not associated with mortality. BMJ Publishing Group 2021-01-18 /pmc/articles/PMC7816928/ /pubmed/33520254 http://dx.doi.org/10.1136/bmjsem-2020-000896 Text en © Author(s) (or their employer(s)) 2021. Re-use permitted under CC BY-NC. No commercial re-use. See rights and permissions. Published by BMJ. http://creativecommons.org/licenses/by-nc/4.0/ http://creativecommons.org/licenses/by-nc/4.0/This is an open access article distributed in accordance with the Creative Commons Attribution Non Commercial (CC BY-NC 4.0) license, which permits others to distribute, remix, adapt, build upon this work non-commercially, and license their derivative works on different terms, provided the original work is properly cited, appropriate credit is given, any changes made indicated, and the use is non-commercial. See: http://creativecommons.org/licenses/by-nc/4.0/.
spellingShingle Original Research
Takeuchi, Taro
Kitamura, Yuri
Ishizuka, Soya
Yamada, Sachiko
Aono, Hiroshi
Kawahara, Takashi
Sobue, Tomotaka
Mortality of Japanese Olympic athletes in 1964 Tokyo Olympic Games
title Mortality of Japanese Olympic athletes in 1964 Tokyo Olympic Games
title_full Mortality of Japanese Olympic athletes in 1964 Tokyo Olympic Games
title_fullStr Mortality of Japanese Olympic athletes in 1964 Tokyo Olympic Games
title_full_unstemmed Mortality of Japanese Olympic athletes in 1964 Tokyo Olympic Games
title_short Mortality of Japanese Olympic athletes in 1964 Tokyo Olympic Games
title_sort mortality of japanese olympic athletes in 1964 tokyo olympic games
topic Original Research
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7816928/
https://www.ncbi.nlm.nih.gov/pubmed/33520254
http://dx.doi.org/10.1136/bmjsem-2020-000896
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