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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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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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.
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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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DOI: https://doi.org/10.1038/s41366-024-01485-8