Visceral adipose tissue quality was associated with nonalcoholic fatty liver disease, independent of its quantity
2022
Igarashi, Yusuke | Tanaka, Muhei | Okada, Hiroshi | Hashimoto, Yoshitaka | Kumagai, Muneaki | Yamaoka, Miyoko | Nishimura, Hiromi | Fukui, Michiaki
Nonalcoholic fatty liver disease (NAFLD) is a serious liver disease. Recent studies have shown that both visceral adipose tissue (VAT) quantity and density (as an indirect measure of quality) are associated with metabolic profiles. Therefore, we investigated the association between VAT quantity and quality, and the prevalence and incidence of NAFLD. In this cross-sectional, retrospective cohort study, the prevalence and incidence of NAFLD were analyzed in 627 and 360 middle-aged subjects, respectively. VAT was evaluated using an unenhanced computed tomography scan, while NAFLD was evaluated using ultrasonography. The VAT area was normalized to the square value of the subjects’ height in meters, the visceral fat area (VFA) index. The VAT density was described as the visceral fat density (VFD). The VFA index and VFD had an interaction effect on the prevalence of NAFLD (P = 0.0059). The VFA index (adjusted odds ratio [OR], 1.04; 95% confidence interval [CI], 1.01–1.07; P = 0.0145, per 1.0 cm²/m²) and the VFD (OR, 0.90; 95% CI, 0.84–0.96; P = 0.0026, per 1.0 Hounsfield unit [HU]) were independently associated with the prevalence of NAFLD. In our cohort, 36 subjects developed NAFLD. The VFD (adjusted hazards ratio [HR], 0.84; 95% CI, 0.77–0.91; P < 0.0001, per 1.0 HU) was independently associated with the incidence of NAFLD, whereas the VFA index was not. Both the VFA index and VFD were independently associated with NAFLD prevalence. The VFD might be more related to the incidence of NAFLD than the VFA index.
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