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| Characteristic | CT group(n = 395) | NCT group(n = 615) | p value |
| age(year) | 64±10. 3 | 64±10. 7 | 0. 690 |
| female gender | 247 (62. 8) | 218 (35. 4) | <0. 001 |
| hypertension | 300 (75. 9) | 423 (68. 8) | 0. 014 |
| diabetes mellitus | 71 (18. 0) | 141 (22. 9) | 0. 059 |
| hyperlipidemia | 68 (17. 2) | 130 (21. 1) | 0. 125 |
| cigarette smoking | 72 (18. 2) | 225 (36. 6) | <0. 001 |
| chronic heart failure | 64 (16. 2) | 106 (17. 2) | 0. 668 |
| CAD | 196 (49. 6) | 373 (60. 7) | 0. 001 |
