MMP2 and diabetes mellitus: The levels of MMP-2 (Figure 3B) were also significantly higher in the diabetes group (median: 0.17250 ng/ml; interquartile range, 0.0735 ng/ml) compared to healthy controls (median = 0.13850 ng/ml; interquartile range, 0.0640 ng/ml; p = 0.008).