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 | ||