Table 2.
Characteristics of 170 Hospitals in Pennsylvania stratified by hospital procedure volume for Total Knee Arthroplasty (TKA)
| Characteristic | Hospital Volume* (n (%) of hospitals) | |||||
|---|---|---|---|---|---|---|
| Overall | Very Low (≤25 cases/yr) | Low (26–100 cases/yr) | High (101–200 cases/yr) | Very High (>200 cases/yr) | P-Value | |
| Total number | 169 (100%) | 69 (100%) | 75 (100%) | 17 (100%) | 8 (100%) | |
|
| ||||||
| Region | 0.187** | |||||
| Pittsburgh and surrounding area | 33 (19.5) | 5 (13.5) | 11 (17.2) | 8 (19.1) | 9 (34.6) | |
| Northwest Pennsylvania | 24 (14.2) | 8 (21.6) | 10 (15.6) | 4 (9.5) | 2 (7.7) | |
| Southern Laurel Highlands | 10 (5.9) | 4 (10.8) | 2 (3.1) | 4 (9.5) | 0 (0) | |
| North Central Pennsylvania | 12 (7.1) | 3 (8.1) | 5 (7.8) | 1 (2.4) | 3 (11.5) | |
| South Central Pennsylvania | 17 (10.1) | 1 (2.7) | 6 (9.4) | 6 (14.3) | 4 (15.4) | |
| Northeast Pennsylvania | 14 (8.3) | 3 (8.1) | 5 (7.8) | 6 (14.3) | 0 (0) | |
| East Pennsylvania | 13 (7.7) | 3 (8.1) | 4 (6.3) | 2 (4.8) | 4 (15.4) | |
| Surrounding Philadelphia | 25 (14.8) | 3 (8.1) | 12 (18.8) | 8 (19.1) | 2 (7.7) | |
| Philadelphia | 21 (21.4) | 7 (18.9) | 9 (14.1) | 3 (7.1) | 2 (7.7) | |
| No. of hospital beds –median (IQR) | 204 (111–314) | 98 (66–163) | 163 (107–239) | 256 (222–362) | 450 (283–536) | <0.01 |
| Teaching hospital | 24 (14.2) | 3 (8.1) | 6 (9.4) | 4 (9.5) | 11 (42.3) | <0.01 |
*
hospitals are divided into 4 groups depending on the annual number of cases of total hip arthroplasty (THA) per year.
**
p-value is from the chi-square test and there are many cells which contain 0’s. Fischer exact test cannot be performed because of the memory.
Percentages may not round up to 100 percent due to rounding error.