Table 1.
Differences in case mix across ambulatory care settings.
| Patient Characteristic | Ambulatory Care Setting
|
P-Value | ||
|---|---|---|---|---|
| HOPD (n=33,802) | ASC (16,798) | Office (233,971) | ||
|
| ||||
| Patient age (SD) | 75.4 (6.8) | 74.9 (6.5) | 75.4 (6.7) | <0.001 |
|
| ||||
| Female, % | 38.2 | 31.5 | 33.8 | <0.001 |
|
| ||||
| Race, % | <0.001 | |||
|
| ||||
| White | 89.6 | 91.0 | 90.2 | |
| Black | 7.7 | 7.2 | 5.6 | |
| Other | 2.7 | 1.8 | 4.2 | |
|
| ||||
| Charlson, % | <0.001 | |||
| 0 | 59.1 | 82.6 | 62.9 | |
| 1 | 23.1 | 9.4 | 22.3 | |
| ≥2 | 17.8 | 8.0 | 14.8 | |
|
| ||||
| Area of residence, % | <0.001 | |||
| West | 8.3 | 12.5 | 16.7 | |
| South | 34.2 | 59.1 | 38.5 | |
| Midwest | 37.8 | 17.0 | 24.4 | |
| Northeast | 19.7 | 11.4 | 20.4 | |
Abbreviations: ASC, ambulatory surgery center; HOPD, hospital outpatient department; SD, standard deviation.