INS and diabetes mellitus: In the No insulin (DM) group, the median MFI was 1093 (IQR: 918–1574), which was not significantly different from the median value of 1303 in the Short-term insulin (DM) group (IQR: 888–2165, p = 0.78) or the median value of 1201 in the Long-term insulin (DM) group (IQR: 1032–1311, p = 0.64).