GDF15 and fatty liver disease: Associations of baseline GDF-15, alcohol intake, FIB-4 score, and metabolic risk factors with hepatic steatosis and fibrosis over 6 years were examined using linear regression models.<h4>Results</h4>In participants with elevated baseline FIB-4, the interaction of GDF-15 and FIB-4 was positively associated with follow-up liver stiffness (β = 0.47, <i>p</i> = 0.045).