Table 2.

CAC conversion rates for subjects with a baseline CAC score of zero stratified according to traditional cardiovascular risk factors

Risk Factor	Converted	P value	Time to Conversion, yrs. (mean)	Time to Conversion, yrs. (median)	P value
Female	18/148 (12.16%)	0.0001	9.70 ± 0.40	10.56 ± 0.45	0.0001
Male	88/311 (28.29%)		7.93 ± 0.27	7.86 ± 0.47
Framingham risk score (%)
<10	23/194 (11.85%)	0.001	9.98 ± 0.36	10.96 ± 0.50	0.0001
≧10	83/265 (31.32%)		7.48 ± 0.26	7.49 ± 0.62
<20	68/349 (19.48%)	0.002	9.00 ± 0.27	10.29 ± 0.73	0.0001
≧20	38/110 (34.54%)		6.85 ± 0.34	6.92 ± 0.65
<30	85/400 (21.25%)	0.02	8.68 ± 0.25	9.72 ± 0.94	0.007
≧30	21/59 (35.59%)		7.11 ± 0.47	7.46 ± 1.05
Age, yrs
<40	4/35 (11.42%)	0.098	10.24 ± 0.90	–	0.044
≧40	102/424 (24.05%)		8.27 ± 0.23	8.52 ± 0.62
<50	35/194 (18.04%)	0.033	9.07 ± 0.39	9.72 ± 1.02	0.025
≧50	71/265 (26.79%)		80.2 ± 0.27	8.48 ± 0.62
<65	93/425 (21.88%)	0.035	8.55 ± 0.24	9.03 ± 0.75	0.006
≧65	13/34 (38.23%)		6.84 ± 0.81	5.94 ± 0.97

CAC coronary artery calcification