Table 2.
Hospital segment characteristics according to hospital OPCAB volume
| Hospitals (patients) | Hospital procedure volume |
|||||||
|---|---|---|---|---|---|---|---|---|
| Lowest quartile (≤14) |
Second quartile (15–29) |
Third quartile (30–59) |
Highest quartile (≥60) |
|||||
| All hospitals (all patients) | 148 | (498) | 67 | (680) | 40 | (727) | 13 | (586) |
| Teaching | 25 | (73) | 20 | (199) | 11 | (208) | 5 | (175) |
| Private not-for-profit ownership | 81 | (267) | 41 | (435) | 22 | (404) | 11 | (526) |
| Hospital index charge (7:1) | 125 | (414) | 58 | (582) | 37 | (701) | 12 | (564) |
| Size | ||||||||
| ≤449 | 55 | (179) | 22 | (217) | 8 | (135) | 3 | (99) |
| 450–799 | 77 | (265) | 32 | (315) | 20 | (346) | 7 | (372) |
| ≥800 | 16 | (54) | 13 | (148) | 12 | (246) | 3 | (115) |
| OPCAB ratio, mean (SD) | ||||||||
| All | 34.3% | (23.5%) | 61.3% | (16.8%) | 67.0% | (13.8%) | 69.1% | (11.9%) |
| ≤449 | 36.7% | (27.8%) | 62.9% | (17.7%) | 77.0% | (12.6%) | 52.4% | (6.1%) |
| 450–799 | 35.0% | (20.9%) | 64.6% | (15.7%) | 69.3% | (13.1%) | 76.3% | (6.9%) |
| ≥800 | 22.5% | (15.9%) | 50.4% | (14.0%) | 56.4% | (8.6%) | 69.2% | (8.3%) |
A total of 268 hospitals and 2491 OPCAB procedures were considered during the study period.
OPCAB ratio: the number of OPCAB procedures divided by the total number of on-pump CABG and OPCAB procedures.
CABG, coronary artery bypass grafting; OPCAB, off-pump.