1.
两组患者基线资料及旋磨程度的比较
Comparison of baseline data and spiral grinding degree between the two groups
| Items | SB group (60 cases) | CB group (60 cases) | χ2/t | P |
| Male [n (%)] | 41 (68.3) | 38 (63.3) | 0.333 | 0.564 |
| Ages（Mean±SD, year） | 71.7±9.3 | 70.8±8.3 | 0.591 | 0.556 |
| Body mass index（Mean±SD, kg/m2） | 26.1±3.0 | 26.9±4.6 | -1.213 | 0.228 |
| Risk factors [n (%)] | ||||
| Diabetes mellitus | 20 (33.3) | 22 (36.7) | 0.147 | 0.702 |
| Hyperlipidemia | 35 (58.3) | 31 (51.7) | 0.539 | 0.463 |
| Hypertension | 23 (38.3) | 27 (45.0) | 0.549 | 0.459 |
| Smoking | 31 (51.7) | 28 (46.7) | 0.300 | 0.584 |
| Chronic kidney disease | 5 (8.3) | 8 (13.3) | 0.776 | 0.378 |
| Medical history | ||||
| Old myocardial infarction | 4 (6.7) | 7 (11.7) | 0.901 | 0.343 |
| Percutaneous coronary intervention | 5 (8.3) | 3 (5.0) | Fisher | 0.717 |
| Coronary artery bypass grafting | 0 | 1 (1.7) | Fisher | 1.000 |
| Lesion location [n (%)] | ||||
| Left anterior descending coronary artery | 34 (56.7) | 31 (51.7) | 0.302 | 0.583 |
| Left main coronary artery | 5 (8.3) | 7 (11.7) | 0.370 | 0.543 |
| Left circumflex artery | 4 (6.7) | 3 (5.0) | Fisher | 1.000 |
| Right coronary artery | 17 (28.3) | 19 (31.7) | 0.159 | 0.690 |
| Bifurcation lesion [n (%)] | 21 (35.0) | 25 (41.7) | 0.564 | 0.453 |
| Ostial lesion [n (%)] | 9 (15.3) | 7 (11.7) | 0.288 | 0.591 |
| Grinding-head diameter (mm, Mean±SD) | 1.49±0.10 | 1.48±0.11 | 0.218 | 0.828 |
| Grinding-head/Reference blood vessels diameter ratio (mm, Mean±SD) | 0.55±0.12 | 0.54±0.10 | 0.585 | 0.560 |
| Left ventricle ejection fraction (Mean±SD, %) | 53.3±5.1 | 51.5±6.0 | 1.775 | 0.078 |
| Cardiac troponin T (Mean±SD, ng/L) | 109.8±14.2 | 110.5±10.6 | -0.313 | 0.755 |
| Creatine kinase MB (Mean±SD, U/L) | 12.2±4.3 | 13.6±5.6 | -1.567 | 0.120 |