MMP9 and coronary artery disorder: In the present meta-analysis, we found a significant association between MMP-9-1562C>T gene polymorphism and CAD in the Chinese Han population under allelic (OR: 1.60), recessive (OR: 3.05), dominant (OR: 2.23), homozygous (OR: 3.41), heterozygous (OR: 2.03), and additive genetic models (OR: 1.78).