Table 1.
US hospitals and study hospital population by characteristics
| Variables | All U.S. hospitals, N = 1141 | Study hospitals, N = 101 | p values |
|---|---|---|---|
| CABG volume | |||
| <50 | 293 (26%) | 19 (19%) | 0.35 |
| 50–99 | 334 (30%) | 33 (33%) | |
| 100–199 | 348 (30%) | 30 (30%) | |
| > 200 | 166 (15%) | 19 (19%) | |
| Geographic area | |||
| North Mid-Atlantic | 149 (13%) | 17 (17%) | |
| South Atlantic | 170 (15%) | 18 (18%) | |
| North Central | 305 (27%) | 24 (24%) | 0.43 |
| South Central | 266 (23%) | 16 (16%) | |
| Mountain-Pacific | 234 (21%) | 26 (26%) | |
| Teaching status | |||
| Yes | 229 (20%) | 31 (31%) | 0.014 |
| No | 903 (79%) | 70 (69%) | |
| Location | |||
| Urban | 1036 (91%) | 93 (92%) | 0.9 |
| Rural | 85 (7%) | 8 (8%) | |
| Ownership | |||
| Non-profit | 795 (70%) | 75 (74%) | 0.66 |
| For-profit | 219 (19%) | 16 (16%) | |
| Government | 118 (10%) | 10 (11%) | |
Bold value indicates statistically significance.