FBL and Hepatic fibrosis: When patients were categorized into two groups based on the Fib-4 index (of 3.25, which is predictive of advanced liver fibrosis), the median serum 25-hydroxyvitamin D3 level was 20 ng/ml (IQR, 16–26 ng/mL) in those with a Fib-4 index of greater than 3.25 and 21 ng/ml (IQR, 17–27 ng/mL) in those with a Fib-4 index of 3.25 or less (p = 7.52 × 10−3).