MMP9 and aortic aneurysm: For MMP9, the AUC on ROC analysis for patients with AAD was 0.70 (95% CI, 0.61 to 0.80) versus all controls, 0.77 (95% CI, 0.63 to 0.91) versus aortic aneurysm without signs of dissection, 0.69 (95% CI, 0.45 to 0.93) versus inflammatory disease, 0.73 (95% CI, 0.56 to 0.89) versus acute coronary syndrome, 0.54 (95% CI, 0.31 to 0.78) versus other diagnoses and 0.76 (95% CI, 0.66 to 0.86) versus uncertain diagnoses.