Taking ownership of your health

Journal Reference:

  1. Ryoto Sakaniwa, Midori Noguchi, Hironori Imano, Kokoro Shirai, Akiko Tamakoshi, Hiroyasu Iso. Impact of modifiable healthy lifestyle adoption on lifetime gain from middle to older age. Age and Ageing, 2022; 51 (5) DOI: 10.1093/ageing/afac080

Lifespan is dependent on social factors such as socioeconomic status, policy factors such as assisted access to healthcare, and lifestyle factors like diet and exercise. The current study used a baseline survey from the JACC study, a large research project of 49,021 individuals conducted from 1988 to1990 in 45 areas of Japan. The aim was to increase knowledge about what factors contribute to death from cancer and cardiovascular disease; thus, the questionnaire included components such as diet, exercise, alcohol intake, smoking status, sleep duration, and body mass index. Points were given for each healthy behavior and the impact of modifying these lifestyle behaviors on projected lifespan was assessed.

The study continued until December 2009, by which time 8,966 individuals had died. The study’s primary author, Dr. Ryoto Sakaniwa said. “The results were very clear. A higher number of modified healthy behaviors was directly associated with great longevity for both men and women.” The lifetime gains were highest for reducing alcohol intake, not smoking, losing weight, and increasing sleep, adding up to 6 years of life for healthy 40-year-olds.

This benefit was prominent even among older individuals (80 years or more) and those with one or more major comorbidities including cancer, cardiovascular disease, hypertension, diabetes, and kidney disease, and in each life stage from middle age onwards. “This is a particularly important finding given that the prevalence of chronic disease has increased globally and is a major cause of death in older populations,” says Senior author, Prof. Hiroyasu Iso. This is one of the first studies to measure the impact of improvements to health behavior among older individuals in a country with a national life expectancy achieving almost 85 years.

The finding that lifestyle improvements has a positive impact on health despite chronic health conditions and older age is an empowering one, especially given the increasing prevalence of chronic conditions and longer life. The findings of this study will contribute to the design of future healthcare settings, public health approaches, and policies that work in partnership with patients to promote healthy lifestyle choices.

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Taking ownership of your health

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