Table 2.
Characteristics of Surgeons† in the Study
| No. of procedure types performed by surgeon: | No. of surgeons n (%): |
| 1 procedure | 210 (64.0) |
| 2 procedures | 83 (25.3) |
| 3 procedures | 32 (9.8) |
| 4 procedures | 3 (0.9) |
|
| |
| No. of procedure types performed by surgeon: | No. of encounters, n (%): |
| 1 procedure | 2521 (37.2) |
| 2 procedures | 2272 (33.5) |
| 3 procedures | 1862 (27.5) |
| 4 procedures | 121 (1.9) |
|
| |
| Surgeon case volume summary statistics during 4-year study period: | |
| Mean (SD) | 84.0 (66.8) |
| 1st quartile | < 31 cases |
| 2nd quartile | 31–67 cases |
| 3rd quartile | 67–120 cases |
| 4th quartile | > 120 cases |
|
| |
| Surgeon case volume during 4-year study period: | No. of surgeons, n (%): |
| 1st quartile (< 28 cases) | 100 (30.5) |
| 2nd quartile (28–67 cases) | 68 (20.7) |
| 3rd quartile (67–120 cases) | 79 (24.1) |
| 4th quartile (> 120 cases) | 81 (24.7) |
|
| |
| Private health plan penetration (per surgeon practice) | |
| Mean (SD) | |
| 1st quartile | 0.50 (0.17) |
| 2nd quartile | < 0.39 |
| 3rd quartile | 0.39–0.50 |
| 4th quartile | 0.50–0.62 |
| > 0.62 | |
|
| |
| Medicare penetration (per surgeon practice) | |
| Mean (SD) | |
| 1st quartile | 0.42 (0.17) |
| 2nd quartile | < 0.31 |
| 3rd quartile | 031–0.39 |
| 4th quartile | 0.39–0.52 |
| > 0.52 | |
|
| |
| Proportion of cases in freestanding ASC (per surgeon practice) | |
| Mean (SD) | 0.66 (0.39) |
| 1st quartile | < 0.35 |
| 2nd quartile | 0.35–0.87 |
| 3rd quartile | 0.87–0.99 |
| 4th quartile | > 0.99 |
†
328 surgeons in the study
SD; standard deviation, ASC; ambulatory surgery center