The association of central obesity with higher rates of mortality is not well studied. This study evaluates the association between waist-to-height ratio (WHtR), as a measure of central obesity, with mortality.
Documents were retrieved from PubMed, Web of Science, Scopus, and Google Scholar databases until May 2022. Data were extracted from cohort studies reporting effect size (hazard ratio (HR)) regarding the association between WHtR as a continuous (per 1 SD increment) or categorical (highest/lowest) measure and all-cause and cause-specific mortality. Screening of included studies was performed independently by two authors. Moreover, the quality assessment of included studies was performed based on the Newcastle-Ottawa assessment scale. Finally, random effect meta-analysis was performed to pool the data, and the outcomes’ certainty level was assess based on the GRADE criteria.
Of the 815 initial studies, 20 were included in the meta-analysis. Random effect meta-analysis showed that in the general population, the all-cause mortality HRs for categorical and continuous measurements of WHtR increased significantly by 23% (HR:1.23; 95% CI: 1.04–1.41) and 16% (HR:1.16; 95% CI: 1.07–1.25), respectively. Moreover, the hazard of cardiovascular (CVD) mortality increased significantly for categorical and continuous measurements of WHtR by 39% (HR:1.39; 95% CI: 1.18–1.59) and 19% (HR:1.19; 95% CI: 1.07–1.31). The quality assessment score of all included studies was high.
Higher levels of WHtR, indicating central obesity, were associated with an increased hazard of CVD and all-cause mortality. This measure can be used in the clinical setting as a simple tool for predicting mortality.
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All data generated or analyzed during this study are included in this published article [and its Supplementary Information files].
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This study was funded by Alborz University of Medical Sciences.
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Supplementary table 1 (S1). The score of Newcastle-Ottawa assessment scale for the retrieved studies. Supplementary table 2. GRADE evidence profile: The association between central obesity and mo
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Abdi Dezfouli, R., Mohammadian Khonsari, N., Hosseinpour, A. et al. Waist to height ratio as a simple tool for predicting mortality: a systematic review and meta-analysis. Int J Obes 47, 1286–1301 (2023). https://doi.org/10.1038/s41366-023-01388-0