open access

https://hdl.handle.net/2115/90334

Association of dietary diversity with all-cause mortality by body mass index in Japanese older adults : An age-specific prospective cohort study (NISSIN project)

英語

older adults

2022-09

John Wiley & Sons

Geriatrics & gerontology international

22(9)

736-744

Aim Dietary diversity might reduce the risk of malnutrition, although it is also linked to obesity. We examined whether dietary diversity is associated with all-cause mortality in Japanese older adults based on their body mass index (BMI). Methods The current study included 2944 people aged 64-65 years who participated in the New Integrated Suburban Seniority Investigation (NISSIN) project from 1996 to 2005. Dietary diversity was measured using the Food Variety Score (FVS), which calculates the frequency of all food items consumed daily using a self-administered food frequency questionnaire. Participants were divided into tertiles according to their FVS (first: low, second: middle, third: high). Multivariate adjusted hazard ratios with 95% confidence intervals were calculated using the Cox proportional hazard regression model. For the stratified analysis, BMI was used to divide the participants into three groups - lean (BMI <20), normal (BMI 20-24.9) and overweight/obese (BMI >= 25). Results Overall, 454 (30.7%) men and 222 (15.2%) women died over a median follow-up period of 16.6 years. No significant association was observed between FVS and all-cause mortality. However, when grouped by BMI, for the participants in the lean group, the multivariate adjusted hazard ratios were 0.56 (95% confidence interval 0.32-0.96) for the middle FVS and 0.50 (95% confidence interval 0.25-1.02) for the high FVS, compared with the low FVS (P for trend = 0.059). In overweight/obese women, although not significant, total mortality was higher in the middle and high FVS. Conclusions These findings show that dietary diversity should be promoted in lean older Japanese adults. Geriatr Gerontol Int 2022; center dot center dot: center dot center dot-center dot center dot.

学術雑誌論文

Accepted Manuscript

This is the peer reviewed version of the following article: Takabayashi, S, Hirata, T, Zhao, W, et al. Association of dietary diversity with all-cause mortality by body mass index in Japanese older adults: An age-specific prospective cohort study (NISSIN project). Geriatr. Gerontol. Int. 2022; 22: 736-744, which has been published in final form at 10.1111/ggi.14446. This article may be used for non-commercial purposes in accordance with Wiley Terms and Conditions for Use of Self-Archived Versions. This article may not be enhanced, enriched or otherwise transformed into a derivative work, without express permission from Wiley or by statutory rights under applicable legislation. Copyright notices must not be removed, obscured or modified. The article must be linked to Wiley’s version of record on Wiley Online Library and any embedding, framing or otherwise making available the article or pages thereof by third parties from platforms, services and websites other than Wiley Online Library must be prohibited.

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