For MMP-9, there was a significant increase in OC compared with controls and a borderline-significant difference compared with OPMD (SMD = 1.507, 95% CI: 0.644–2.369, p = 0.001; SMD = 1.626, 95% CI: −0.097–3.350, p = 0.064, respectively). This evidence concerns the gene MMP9 and oculopharyngeal muscular dystrophy.