Table 3.

Change in risk discrimination capability (C-statistic) of a traditional risk factor model^* for predicting incident cardiovascular events after addition of coronary artery calcium score categories

	ASCVD events		CHD events		Stroke events
Group	Baseline	Change (95%CI)	Baseline	Change (95%CI)	Baseline	Change (95%CI)
Overall	0.749	0.021 (0.011,0.031)	0.754	0.035 (0.020,0.051)	0.737	0.003 (−0.004,0.012)
Men	0.730	0.026 (0.010,0.043)	0.717	0.047 (0.023,0.071)	0.735	-0.002 (−0.015,0.011)
Women	0.757	0.015 (0.003,0.026)	0.749	0.032 (0.007,0.057)	0.761	0.003 (−0.006,0.012)
Whites	0.757	0.015 (0.001,0.028)	0.754	0.037 (0.013,0.062)	0.754	0.002 (−0.009,0.014)
Blacks	0.734	0.031 (0.012,0.051)	0.740	0.040 (0.013,0.068)	0.716	0.017 (−0.007,0.040)
Hispanics	0.776	0.017 (0.002,0.033)	0.790	0.022 (−0.002,0.046)	0.775	0.003 (−0.009,0.015)

^*Traditional risk factor model contains age, sex, race, smoking, diabetes, systolic blood pressure, antihypertensive use, total cholesterol, high density lipoprotein-cholesterol level, family history of myocardial infarction, and statin use. Abbreviations: CI = confidence interval, ASCVD = atherosclerotic cardiovascular disease, CHD = coronary heart disease. Bold values indicate statistically significant association (two-sided p-value <0.05).