The invention relates to an in vitro method of determining a subjects risk of liver dysfunction, specifically after partial liver resection, said method comprising the steps of providing a sample from said subject, determining in said sample the expression level of at least one miRNA, selected from the group consisting of miR-151a, miR-192 and miR-122, and comparing these expression level(s) with at least one reference expression level, or identifying the ratios of the expression levels of miR-15 la to miR-192 and/or of miR-122 to miR-151a and comparing said expression level ratios with reference expression level ratios, and classifying the sample from the outcome of the comparison into one of at least two classes, wherein each class is one of the at least two categories “high-risk” and “low-risk”.