Impact of obesity, overweight and underweight on life expectancy and lifetime medical expenditures: The Ohsaki Cohort Study

Masato Nagai, Shinichi Kuriyama, Masako Kakizaki, Kaori Ohmori-Matsuda, Toshimasa Sone, Atsushi Hozawa, Miyuki Kawado, Shuji Hashimoto, Ichiro Tsuji

Research output: Contribution to journalArticle

26 Citations (Scopus)

Abstract

Objectives: People who are obese have higher demands for medical care than those of the normal weight people. However, in view of their shorter life expectancy, it is unclear whether obese people have higher lifetime medical expenditure. We examined the association between body mass index, life expectancy and lifetime medical expenditure. Design: Prospective cohort study using individual data from the Ohsaki Cohort Study. Setting: Miyagi Prefecture, northeastern Japan. Participants: The 41 965 participants aged 40-79 years. Primary and secondary outcome measures: The life expectancy and lifetime medical expenditure aged from 40 years. Results: In spite of their shorter life expectancy, obese participants might require higher medical expenditure than normal weight participants. In men aged 40 years, multiadjusted life expectancy for those who were obese participants was 41.4 years (95% CI 38.28 to 44.70), which was 1.7 years non-significantly shorter than that for normal weight participants (p=0.3184). Multiadjusted lifetime medical expenditure for obese participants was £112 858.9 (94 954.1-131 840.9), being 14.7% non-significantly higher than that for normal weight participants (p=0.1141). In women aged 40 years, multiadjusted life expectancy for those who were obese participants was 49.2 years (46.14-52.59), which was 3.1 years non-significantly shorter than for normal weight participants (p=0.0724), and multiadjusted lifetime medical expenditure was £137 765.9 (123 672.9-152 970.2), being 21.6% significantly higher (p=0.0005). Conclusions: According to the point estimate, lifetime medical expenditure might appear to be higher for obese participants, despite their short life expectancy. With weight control, more people would enjoy their longevity with lower demands for medical care.

Original languageEnglish
Article numbere000940
JournalBMJ Open
Volume2
Issue number3
DOIs
Publication statusPublished - 18-06-2012

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Thinness
Health Expenditures
Life Expectancy
Cohort Studies
Obesity
Weights and Measures
Japan
Body Mass Index
Outcome Assessment (Health Care)
Prospective Studies

All Science Journal Classification (ASJC) codes

  • Medicine(all)

Cite this

Nagai, Masato ; Kuriyama, Shinichi ; Kakizaki, Masako ; Ohmori-Matsuda, Kaori ; Sone, Toshimasa ; Hozawa, Atsushi ; Kawado, Miyuki ; Hashimoto, Shuji ; Tsuji, Ichiro. / Impact of obesity, overweight and underweight on life expectancy and lifetime medical expenditures : The Ohsaki Cohort Study. In: BMJ Open. 2012 ; Vol. 2, No. 3.
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abstract = "Objectives: People who are obese have higher demands for medical care than those of the normal weight people. However, in view of their shorter life expectancy, it is unclear whether obese people have higher lifetime medical expenditure. We examined the association between body mass index, life expectancy and lifetime medical expenditure. Design: Prospective cohort study using individual data from the Ohsaki Cohort Study. Setting: Miyagi Prefecture, northeastern Japan. Participants: The 41 965 participants aged 40-79 years. Primary and secondary outcome measures: The life expectancy and lifetime medical expenditure aged from 40 years. Results: In spite of their shorter life expectancy, obese participants might require higher medical expenditure than normal weight participants. In men aged 40 years, multiadjusted life expectancy for those who were obese participants was 41.4 years (95{\%} CI 38.28 to 44.70), which was 1.7 years non-significantly shorter than that for normal weight participants (p=0.3184). Multiadjusted lifetime medical expenditure for obese participants was £112 858.9 (94 954.1-131 840.9), being 14.7{\%} non-significantly higher than that for normal weight participants (p=0.1141). In women aged 40 years, multiadjusted life expectancy for those who were obese participants was 49.2 years (46.14-52.59), which was 3.1 years non-significantly shorter than for normal weight participants (p=0.0724), and multiadjusted lifetime medical expenditure was £137 765.9 (123 672.9-152 970.2), being 21.6{\%} significantly higher (p=0.0005). Conclusions: According to the point estimate, lifetime medical expenditure might appear to be higher for obese participants, despite their short life expectancy. With weight control, more people would enjoy their longevity with lower demands for medical care.",
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Impact of obesity, overweight and underweight on life expectancy and lifetime medical expenditures : The Ohsaki Cohort Study. / Nagai, Masato; Kuriyama, Shinichi; Kakizaki, Masako; Ohmori-Matsuda, Kaori; Sone, Toshimasa; Hozawa, Atsushi; Kawado, Miyuki; Hashimoto, Shuji; Tsuji, Ichiro.

In: BMJ Open, Vol. 2, No. 3, e000940, 18.06.2012.

Research output: Contribution to journalArticle

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T1 - Impact of obesity, overweight and underweight on life expectancy and lifetime medical expenditures

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AU - Nagai, Masato

AU - Kuriyama, Shinichi

AU - Kakizaki, Masako

AU - Ohmori-Matsuda, Kaori

AU - Sone, Toshimasa

AU - Hozawa, Atsushi

AU - Kawado, Miyuki

AU - Hashimoto, Shuji

AU - Tsuji, Ichiro

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