Abstract
A plant-based dietary pattern has been recommended for its potential health and environmental benefits, but its relation to mortality warrants further exploration1. We examined this association among 13,154 adults aged 65 years and older (57.4% female) in the Chinese Longitudinal Healthy Longevity Survey (CLHLS). The overall plant-based diet index (PDI), healthful plant-based diet index (hPDI) and unhealthful plant-based diet index (uPDI) were calculated using dietary data collected by a simplified food frequency questionnaire (FFQ). Compared with the lowest quintile, participants in the highest quintile of PDI and hPDI had a decreased risk of all-cause mortality (hazard ratio (HR) = 0.92; 95% confidence interval (CI) 0.86, 0.98 for PDI; HR = 0.81, 95% CI, 0.76, 0.87 for hPDI), whereas participants with the highest uPDI scores had a 17% (95% CI, 9%, 26%) increased risk. Among plant foods, fresh fruits, fresh vegetables, legumes, garlic, nuts and tea were the main protective contributors, whereas preserved vegetables and sugar were associated with a higher risk of mortality. These findings support the beneficial roles of overall and healthful plant-based dietary patterns. The quality, and not only quantity, of plant foods should be emphasized in relevant public health recommendations.
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Data availability
Data described in this paper are stored in the Peking University Open Research Data Platform, a public data repository (https://opendata.pku.edu.cn/dataset.xhtml?persistentId=doi:10.18170/DVN/WBO7LK).
Code availability
The code scripts used in this analysis are available from the corresponding authors upon reasonable request.
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Acknowledgements
This work was supported by Fundamental Research Funds from the Central Universities of Zhejiang University (X.W. and C. Y.). The collection of the CLHLS datasets analyzed in this paper was jointly supported by the National Key R&D Program of China (2018YFC2000400), the National Natural Sciences Foundation of China (72061137004), the National Institute on Aging of the National Institutes of Health (P01AG031719) and Duke/Duke-NUS (grant RECA(Pilot)/2019/0051 to Y. Z.). The funders had no role in study design, data collection, analysis, decision to publish or manuscript preparation. We are grateful to all cooperating organizations and their staff during the CLHLS, whose hard work made this study possible. We thank the interviewees and their families for their voluntary participation in the CLHLS.
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C.Y., J.S.J., X.W., and H.C. designed the analysis; H.C. and A.Z. performed the statistical analyses; J.S., J.X., X.W., and X.L. interpreted the data; J.S. and H.C. drafted the manuscript; X.L., Y.C., X.W. and G.Z. critically reviewed and revised the manuscript; Y.Z. designed and administered the original CLHLS; C.Y. and X.W. supervised the data analysis and interpretation; and C.Y. had primary responsibility for the final content. All authors approved the final draft.
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Nature Aging thanks Zhangling Chen, Shankar Viswanathan and Paul Jacques for their contribution to the peer review of this work.
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Extended data figures and tables
Extended Data Fig. 1 The pairwise Spearman correlation coefficient between different food groups.
Pairwise Spearman correlation coefficients were presented.
Extended Data Fig. 2 Flow chart of participant inclusion.
Of a total of 16954 participants, 13154 eligible participants were included in the final analysis.
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Supplementary Information
Supplementary Tables 1–10.
Source data
Source Data Fig. 1
Source data for Fig. 1.
Source Data Fig. 2
Source data for Fig. 2.
Extended Data Fig. 1
Source data for Extended Data Fig. 1.
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Chen, H., Shen, J., Xuan, J. et al. Plant-based dietary patterns in relation to mortality among older adults in China. Nat Aging 2, 224–230 (2022). https://doi.org/10.1038/s43587-022-00180-5
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DOI: https://doi.org/10.1038/s43587-022-00180-5
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