The Severity of Ultrasonographic Findings in Nonalcoholic Fatty Liver Disease Reflects the Metabolic Syndrome and Visceral Fat Accumulation

Hamaguchi, Masahide; Kojima, Takao; Itoh, Yoshito; Harano, Yuichi; Fujii, Kota; Nakajima, Tomoaki; Kato, Takahiro; Takeda, Noriyuki; Okuda, Junichi; Ida, Kazunori; Kawahito, Yutaka; Yoshikawa, Toshikazu; Okanoue, Takeshi
December 2007
American Journal of Gastroenterology;Dec2007, Vol. 102 Issue 12, p2708
Academic Journal
BACKGROUND: Nonalcoholic fatty liver disease (NAFLD) is closely associated with the metabolic syndrome. AIM: We evaluated the association among the metabolic syndrome, visceral fat accumulation, and the severity of fatty liver with a new scoring system of ultrasonographic findings in apparently healthy Japanese adults. METHODS: Subjects consisted of 94 patients who received liver biopsy and 4,826 participants who were selected from the general population. Two hepatologists scored the ultrasonographic findings from 0 to 6 points. We calculated Cohen's kappa of within-observer reliability and between-observer reliability. We evaluated the predictive value of the score by the area under a conventional receiver operating characteristic curve (AUC). RESULTS: Within-observer reliability was 0.95 (95% CI 0.93–0.97, P < 0.001) and between-observer reliability was 0.95 (95% CI 0.93–0.97, P < 0.001). The AUC to diagnose NAFLD was 0.980. The sensitivity was 91.7% (95% CI 87.0–95.1, P < 0.001) and the specificity was 100% (95% CI 95.4–100.0, P < 0.001). The AUC to diagnose visceral obesity was 0.821. The sensitivity was 68.3% (95% CI 51.9–81.9, P= 0.028) and the specificity was 95.1% (95% CI 86.3–99.0, P < 0.001). Adjusted odds ratio of the score for the metabolic syndrome was 1.37 (95% CI 1.26–1.49, P < 0.001). CONCLUSIONS: The scoring system with abdominal ultrasonography could provide accurate information about hepatic steatosis, visceral obesity, and the metabolic syndrome in apparently healthy people who do not consume alcohol.


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