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Sex-related differences in serum matrix metalloproteinase-9 screening non-calcified and mixed coronary atherosclerotic plaques in outpatients with chest pain.
Heart and Vessels 2017 December
The objective of this study is to evaluate the clinical feasibility of serum matrix metalloproteinase-9 (MMP-9) for screening plaque composition as assessed by coronary computed tomography angiography (CCTA) in outpatients with chest pain,and the effects of sex on this feasibility. Eight hundred and sixty-two consecutive outpatients with chest pain were divided into three groups according to the results of CCTA: non-plaque (NP, n = 474), calcified plaques (CPs, n = 179), non-calcified and mixed plaques (NCPs and MPs, n = 209). We found that serum MMP-9 levels were significantly higher in patients with NCPs and MPs compared to those with either NP or CPs, especially in women (649.7 ± 279.8 vs. 485.7 ± 231.6 ng/mL or 515.7 ± 274.5 ng/mL, P < 0.001). MMP-9 showed better identification of NCPs and MPs than other related factors and was an independent predictor for NCPs and MPs both in women and men. The receiver operating characteristic analysis indicated a substantial superiority in women with area under the curve of 0.75 (95% CI 0.69-0.82, P < 0.01), compared with men of 0.59 (95% CI 0.53-0.65, z = 3.71, P < 0.01). The diagnostic tests revealed a moderate risk of the presence of NCPs and MPs with MMP-9 ≥531.6 ng/mL in female patients.
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