Cox regression analysis for factors increasing the rate of bypass patency in the propensity score-matched cases
| Covariate | Univariable | Multivariable | ||
| HR (95% CI) | P value | HR (95% CI) | P value | |
| Mean age, years | 1.02 (0.997 to 1.033) | 0.095 | 1.02 (1.000 to 1.040) | 0.055 |
| Sex | 0.95 (0.682 to 1.310) | 0.739 | 0.77 (0.520 to 1.144) | 0.196 |
| Smoking | 1.45 (0.911 to 2.320) | 0.117 | 1.63 (0.964 to 2.744) | 0.069 |
| Diabetes | 1.72 (0.900 to 3.300) | 0.101 | 1.68 (0.833 to 3.377) | 0.147 |
| Hypertension | 0.89 (0.625 to 1.262) | 0.508 | 0.90 (0.610 to 1.324) | 0.589 |
| Hyperlipidaemia | 2.07 (1.082 to 3.976) | 0.028 | 1.71 (0.880 to 3.329) | 0.113 |
| Suzuki stage | 0.89 (0.742 to 1.056) | 0.175 | 0.91 (0.753 to 1.088) | 0.289 |
| Posterior involvement | 1.00 (0.659 to 1.514) | 0.995 | 0.95 (0.598 to 1.511) | 0.831 |
| Aspirin | 1.47 (1.050 to 2.042) | 0.024 | 1.57 (1.106 to 2.235) | 0.012 |