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Cardiometabolic Health Outcomes Associated With Discordant Visceral and Liver Fat Phenotypes: Insights From the Dallas Heart Study and UK Biobank

Published:September 28, 2021DOI:https://doi.org/10.1016/j.mayocp.2021.08.021

      Abstract

      Objective

      To evaluate the cardiometabolic outcomes associated with discordant visceral adipose tissue (VAT) and liver fat (LF) phenotypes in 2 cohorts.

      Patients and Methods

      Participants in the Dallas Heart Study underwent baseline imaging from January 1, 2000, through December 31, 2002, and were followed for incident cardiovascular disease (CVD) and type 2 diabetes mellitus (T2DM) through 2013. Associations between VAT-LF groups (low-low, high-low, low-high, and high-high) and outcomes were assessed using multivariable-adjusted regression and were replicated in the independent UK Biobank.

      Results

      The Dallas Heart Study included 2064 participants (mean ± SD age, 44±9 years; 54% female; 47% black). High VAT–high LF and high VAT–low LF were associated with prevalent atherosclerosis, whereas low VAT–high LF was not. Of 1731 participants without CVD/T2DM, 128 (7.4%) developed CVD and 95 (5.5%) T2DM over a median of 12 years. High VAT–high LF and high VAT–low LF were associated with increased risk of CVD (hazard ratios [HRs], 2.0 [95% CI, 1.3 to 3.2] and 2.4 [95% CI, 1.4 to 4.1], respectively) and T2DM (odds ratios [ORs], 7.8 [95% CI, 3.8 to 15.8] and 3.3 [95% CI, 1.4 to 7.8], respectively), whereas low VAT–high LF was associated with T2DM (OR, 2.7 [95% CI, 1.1 to 6.7]). In the UK Biobank (N=22,354; April 2014-May 2020), only high VAT–low LF remained associated with CVD after multivariable adjustment for age and body mass index (HR, 1.5 [95% CI, 1.2 to 1.9]).

      Conclusion

      Although VAT and LF are each associated with cardiometabolic risk, these observations demonstrate the importance of separating their cardiometabolic implications when there is presence or absence of either or both in an individual.

      Abbreviations and Acronyms:

      BMI (body mass index), CI (confidence interval), CVD (cardiovascular disease), DHS (Dallas Heart Study), FBG (fasting blood glucose), HDL (high-density lipoprotein), HOMA-IR (homeostasis model assessment of insulin resistance), HR (hazard ratio), hs-CRP (high-sensitivity C-reactive protein), LF (liver fat), MRI (magnetic resonance imaging), NAFLD (nonalcoholic fatty liver disease), OR (odds ratio), T2DM (type 2 diabetes mellitus), UKB (UK Biobank), VAT (visceral adipose tissue), VLDL (very low-density lipoprotein)
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