Table 3.

Discrimination and reclassification of CAC for CAD

Model	Women			Men
	C-statistic (95% CI)	NRI	Reclassification (%)	C-statistic (95% CI)	NRI	Reclassification (%)
Clinical model*	0.66 (0.58 to 0.73)	–	–	0.61 (0.55 to 0.67)	–	–
+CAC continuous†	0.79 (0.73 to 0.85)	0.33	24.8	0.83 (0.78 to 0.87)	0.71	58.6
+CAC categorical	0.78 (0.72 to 0.85)	0.26	22.5	0.82 (0.78 to 0.86)	0.69	62.7

*Clinical model includes age, systolic blood pressure, use of blood pressure-lowering medication, total cholesterol, high-density lipoprotein cholesterol and current smoker.

†CAC continuous=ln (CAC score+1).

CAC, coronary artery calcification; CAD, coronary artery disease; NRI, net reclassification index.