Table 1. Characteristics of Patients Undergoing TAVR Procedures by Hospital SAVR Volume.
| Characteristic | Patients, No. (%) | P Value | All Patients, No. (%) (N = 60 538) | |
|---|---|---|---|---|
| Low SAVR (n = 29 454) | High SAVR (n = 31 084) | |||
| Age, mean (SD), y | 82.1 (8.0) | 82.5 (8.1) | <.001 | 82.3 (8.0) |
| Female sex | 14 167 (48.1) | 15 006 (48.3) | .66 | 29 173 (48.2) |
| White race | 27 130/29354 (92.4) | 29 071/30999 (93.8) | <.001 | 56 201/60353 (93.1) |
| Comorbidities within 1 y | ||||
| Coronary artery disease | 23 379 (79.4) | 24 848 (79.9) | .09 | 48 227 (79.7) |
| Hypertension | 27 130 (92.1) | 28 729 (92.4) | .15 | 55 859 (92.3) |
| Chronic heart failure | 23 224 (78.9) | 25 485 (82.0) | <.001 | 48 709 (80.5) |
| Diabetes | 11 969 (40.6) | 12 323 (39.6) | .01 | 24 292 (40.1) |
| Chronic pulmonary disease | 11 780 (40.0) | 12 461 (40.1) | .81 | 24 241 (40.0) |
| Obesity | 5738 (19.5) | 5896 (19.0) | .11 | 11 634 (19.2) |
| Cerebrovascular disease | 2394 (8.1) | 2614 (8.4) | .21 | 5008 (8.3) |
| Peripheral artery disease | 8313 (28.2) | 8879 (28.6) | .35 | 17 192 (28.4) |
| Recent conditions within 90 d | ||||
| Cardiovascular eventsa | 4655 (15.8) | 4790 (15.4) | .18 | 9445 (15.6) |
| Atrial fibrillation or flutter | 12 262 (41.6) | 13 553 (43.6) | <.001 | 25 815 (42.6) |
| Renal failure | 2830 (9.6) | 3202 (10.3) | .004 | 6032 (10.0) |
| Previous valve intervention | 3543 (12.0) | 3936 (12.7) | .02 | 7479 (12.4) |
| Previous CABG or septal defect repair | 3524 (12.0) | 3748 (12.1) | .72 | 7272 (12.0) |
| Previous PCI | 6588 (22.4) | 6889 (22.2) | .54 | 13 477 (22.3) |
| Approach of procedure | <.001 | |||
| Transfemoral | 24 804 (84.2) | 27 157 (87.4) | 51 961 (85.8) | |
| Transapical | 4650 (15.8) | 3927 (12.6) | 8577 (14.2) | |
| Elective procedure | 23 771 (80.7) | 23 430 (75.4) | <.001 | 47 201 (78.0) |
| Concurrent PCI | 1004 (3.4) | 1047 (3.4) | .78 | 2051 (3.4) |
| Teaching hospital | 13 313 (45.2) | 23 386 (75.2) | <.001 | 36 699 (60.6) |
| Hospital region | <.001 | |||
| Northeast | 4908 (16.7) | 11 187 (36.0) | 16 095 (26.6) | |
| Midwest | 6617 (22.4) | 7352 (23.6) | 13 969 (23.1) | |
| South | 11 521 (39.1) | 8145 (26.2) | 19 666 (32.5) | |
| West | 6408 (21.8) | 4400 (14.2) | 10 808 (17.9) | |
| Hospital TAVR volume (all years) | <.001 | |||
| Low | 21 113 (71.7) | 10 703 (34.4) | 31 816 (52.6) | |
| High | 8341 (28.3) | 20 381 (65.6) | 28 722 (47.4) | |
| Hospital PCI volume | <.001 | |||
| Low | 19 977 (67.8) | 10 258 (33.0) | 30 235 (49.9) | |
| High | 9477 (32.2) | 20 826 (67.0) | 30 303 (50.1) | |
Abbreviations: CABG, coronary artery bypass graft; PCI, percutaneous coronary intervention; SAVR, surgical aortic valve replacement; TAVR, transcatheter aortic valve replacement.
a
Recent cardiovascular conditions included acute myocardial infarction, carotid stenosis, and endocarditis.