BACKGROUND AND AIMS: The association between testosterone level and development of non-alcoholic fatty liver disease (NAFLD) is not well known. We examined the relationship of total testosterone level with development and regression of NAFLD. METHODS: Among the men who had undergone repeated liver ultrasonography in 2 years or more at a health promotion center, subjects with available serum testosterone level at baseline were included in the study. Alcohol consumers (> 20 g/day) were excluded from the study. RESULTS: Among the 1944 men, 44.3% of subjects were diagnosed with NAFLD. Higher level of testosterone significantly lowered the prevalence of fatty liver (odds ratios per SD increase, 0.686 and 0.795 at baseline and follow-up, respectively). During the median 4.2 years follow-up, 22.4% of subjects in the normal group developed fatty liver, and 21.0% of subjects in the NAFLD group recovered at the follow-up. In longitudinal analyses, higher level of testosterone was significantly associated with the development or regression of fatty liver, before adjustment for obesity and metabolic parameters. However, in the full-adjusted model, testosterone level did not influence the development or regression of fatty liver. CONCLUSIONS: Although testosterone level was significantly low in the subjects with NAFLD in cross-sectional analyses, baseline testosterone level did not independently influence the development or regression of fatty liver at the median 4.2 years follow-up. Obesity and metabolic parameters may play key roles in the link between testosterone level and NAFLD.
BACKGROUND AND AIMS: The association between testosterone level and development of non-alcoholic fatty liver disease (NAFLD) is not well known. We examined the relationship of total testosterone level with development and regression of NAFLD. METHODS: Among the men who had undergone repeated liver ultrasonography in 2 years or more at a health promotion center, subjects with available serum testosterone level at baseline were included in the study. Alcohol consumers (> 20 g/day) were excluded from the study. RESULTS: Among the 1944 men, 44.3% of subjects were diagnosed with NAFLD. Higher level of testosterone significantly lowered the prevalence of fatty liver (odds ratios per SD increase, 0.686 and 0.795 at baseline and follow-up, respectively). During the median 4.2 years follow-up, 22.4% of subjects in the normal group developed fatty liver, and 21.0% of subjects in the NAFLD group recovered at the follow-up. In longitudinal analyses, higher level of testosterone was significantly associated with the development or regression of fatty liver, before adjustment for obesity and metabolic parameters. However, in the full-adjusted model, testosterone level did not influence the development or regression of fatty liver. CONCLUSIONS: Although testosterone level was significantly low in the subjects with NAFLD in cross-sectional analyses, baseline testosterone level did not independently influence the development or regression of fatty liver at the median 4.2 years follow-up. Obesity and metabolic parameters may play key roles in the link between testosterone level and NAFLD.
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