Table 1.
Baseline Characteristics
| Characteristic | iFR, n=473 | FFR, n=435 | P value |
|---|---|---|---|
| Age, y, M±SD | 67.4±9.7 | 67.2±9.3 | 0.80 |
| Men, % (n) | 68.3 (323) | 67.4 (293) | 0.76 |
| Body mass index, kg/m2, M±SD | 27.4±4.3 | 27.5±4.5 | 0.74 |
| Diabetes, % (n) | 17.6 (83) | 17.5 (76) | 0.36 |
| Hypertension, % (n) | 72.5 (342) | 69.7 (303) | 0.23 |
| Hyperlipidemia, % (n) | 74.4 (351) | 68.7 (299) | 0.10 |
| Nonsmoker, % (n) | 33.6 (159) | 36.6 (159) | <0.05 |
| Current smoker, % (n) | 16.1 (76) | 15.6 (68) | |
| Previous smoker, % (n) | 49.9 (236) | 45.7 (199) | |
| Previous MI, % (n) | 33.1 (156) | 33.1 (144) | 0.16 |
| Previous PCI, % (n) | 46.3 (219) | 43.5 (189) | 0.39 |
| CCS angina class | <0.05 | ||
| I, % (n) | 34.7 (96) | 29.3 (67) | |
| II, % (n) | 62.5 (173) | 59.0 (135) | |
| III, % (n) | 2.5 (7) | 10.9 (25) | |
| IV, % | 0 | 0 | |
| Clinical presentation | 0.28 | ||
| Acute coronary syndrome, % (n) | 31.1 (147) | 34.5 (150) | |
| Stable angina pectoris, % (n) | 68.9 (326) | 65.5 (285) |
CCS indicates Canadian Cardiovascular Society; FFR, fractional flow reserve; iFR, instantaneous wave‐free ratio; M, mean; MI, myocardial infarction; and PCI, percutaneous coronary intervention.