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Epidemiology and Population Health

Associations of obesity indices change with cardiovascular outcomes: a dose-response meta-analysis

Abstract

Background

Little is known about the degrees and shapes of associations of changes in obesity indices with cardiovascular disease (CVD) and mortality risks. We aimed to conduct a dose-response meta-analysis for the associations of changes in weight, body mass index (BMI), waist circumference (WC), waist-to-hip ratio, and waist-to-height ratio with CVD events, CVD-specific deaths, and all-cause mortality.

Methods

We searched MEDLINE via OvidSP, Embase via OvidSP, Web of Science, CINAHL, and Scopus for articles published before January 8th, 2023. Dose-response relationships were modeled using the one-stage mixed-effects meta-analysis. Random-effects models were used to pool the relative risk (RR) and 95% confidence interval (CI).

Results

We included 122 articles. Weight change was negatively associated with deaths from CVD and any cause, while WC change elevated CVD-specific mortality. Non-linear relationships also confirmed the adverse effects of increased WC on CVD-specific mortality. Additionally, gains of 5 kg in weight and 1 kg/m2 in BMI or more were associated with elevated CVD events, especially among young adults and individuals without CVD. Conversely, reductions of 5 kg in weight and 1 kg/m2 in BMI or more were associated with higher CVD-specific and all-cause deaths than increased counterparts, particularly among old adults and individuals with CVD. Similar non-linear relationships between relative changes in weight and BMI and deaths from CVD and any cause were observed.

Conclusions

The effects of changes in weight and BMI on CVD outcomes were affected by age and cardiovascular health. Tailored weight management and avoidance of increased WC should be recommended.

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Fig. 1: The flow chart of the selection process.
Fig. 2: Dose-response relationships between changes in obesity indices and cardiovascular disease events.
Fig. 3: Dose-response relationships between changes in obesity indices and cardiovascular disease mortality.
Fig. 4: Dose-response relationships between changes in obesity indices and all-cause mortality.

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Data availability

The data used in this publication are readily available from original source papers included in the study.

Code availability

R codes for data analysis associated with the current study is available at https://zenodo.org/records/10467654.

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Acknowledgements

We showed great thanks to all authors who contributed to this study and librarians who gave support in building search strategies.

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Authors

Contributions

LW and HD designed the research and conducted the literature search and screening. YD worked as the third reviewer. LW performed the statistical analysis of the data. LW and HD wrote the manuscript draft. MW, XL, JH, and YD contributed to the critical revision of the manuscript. All authors have approved the final draft of the manuscript.

Corresponding author

Correspondence to Martin C. S. Wong.

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Wang, L., Ding, H., Deng, Y. et al. Associations of obesity indices change with cardiovascular outcomes: a dose-response meta-analysis. Int J Obes (2024). https://doi.org/10.1038/s41366-024-01485-8

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