Crude and adjusted HR for the primary endpoint
| Coronary artery spasm | Crude HR (95% CI) | P value | Adjusted HR (95% CI)* | P value |
| Cox proportional hazards model | 2.19 (1.33 to 3.63) | 0.002 | 1.87 (1.11 to 3.16) | 0.018 |
| Competing risks† | ||||
| Model 1 | 2.37 (1.41 to 3.99) | 0.001 | 2.08 (1.21 to 3.56) | 0.008 |
| Model 2 | 2.38 (1.36 to 4.19) | 0.003 | 2.02 (1.12 to 3.67) | 0.020 |
*Adjusted for age, sex, smoking, hypertension, diabetes mellitus, dyslipidaemia and history of percutaneous coronary intervention.
†Using the Fine-Gray method, cardiovascular death and all-cause death were a single competing risk in model 1 and model 2, respectively.