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Original research|Articles in Press

Anthropometric indicators of adiposity and risk of primary liver cancer: A systematic review and dose–response meta-analysis

Published:March 07, 2023DOI:https://doi.org/10.1016/j.ejca.2023.03.005

      Highlights

      • BMI, WC, WHR, WHtR, and HC were, respectively, positively associated with risk of PLC.
      • Elevated WC, independent of BMI, was associated with an increased risk of PLC.
      • The incidence of PLC was higher in central adiposity than that in general adiposity.
      • WC might be a more promising predictive indicator for PLC beyond BMI.

      Abstract

      Background and aims

      Adiposity is associated with an increased risk of primary liver cancer (PLC). As the most commonly used indicator of adiposity, the body mass index (BMI) has been questioned for its limitations in reflecting visceral fat. This study aimed to investigate the role of different anthropometric indicators in identifying the risk of PLC by accounting for potential non-linear associations.

      Methods

      Systematic searches were conducted in the PubMed, Embase, Cochrane Library, Sinomed, Web of Science, and CNKI databases. Hazard ratios (HRs) and the corresponding 95% confidence intervals (CIs) were used to assess the pooled risk. The dose-response relationship was assessed using a restricted cubic spline model.

      Results

      Sixty-nine studies involving more than 30 million participants were included in the final analysis. Regardless of the indicator used, adiposity was strongly associated with an increased risk of PLC. When comparing the HRs per 1-standard deviation increment across indicators of adiposity, the association was strongest for waist-to-height ratio (WHtR) (HR = 1.39), followed by waist-to-hip ratio (WHR) (HR = 1.22), BMI (HR = 1.13), waist circumference (WC) (HR = 1.12), and hip circumference (HC) (HR = 1.12). A strong non-linear association was observed between each anthropometric parameter and the risk of PLC, regardless of whether the original or decentralised value was used. The positive association between WC and PLC risk remained substantial after adjusting for BMI. The incidence of PLC was higher with central adiposity (52.89 per 100,000 person-years, 95% CI = 50.33–55.44) than general adiposity (39.01 per 100,000 person-years, 95% CI = 37.26–40.75).

      Conclusion

      Central adiposity seems to contribute more to the development of PLC than general adiposity. A larger WC, independent of BMI, was strongly associated with the risk of PLC and might be a more promising predictive indicator than BMI.

      Graphical abstract

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