Adjusted Changes in Length of Hospital Stay After Total Knee Arthroplasty for Provider Volume, Patient Age, Comorbidity, Diagnosis and Gender
| Variable | Stay, mean extra days (and 95% CL)* |
|---|---|
| Surgeon volume | |
| Low < 14 v. high > 42 | 1.4 (1.2, 1.9) |
| Mid 14–42 v. high > 42 | 0.5 (–0.1, 0.7) |
| Hospital volume | |
| Low < 48 v. high > 113 | 0.8 (0.5, 1.1) |
| Low 48–113 v. high > 113 | 0.4 (0.2, 0.6) |
| Patient age, per 10 yr | 0.7 (0.5, 0.8) |
| Patient comorbidity | |
| 1 v. 0 | 0.9 (0.5, 1.2) |
| > 1 v. 0 | 2.8 (1.8, 3.7) |
| Diagnosis, osteoarthritis v. no osteoarthritis | 0.2 (–0.6, 0.2) |
| Patient gender, female v. male | 0.4 (0.2, 0.6) |
↵* Significant values appear in bold.
CL = confidence limits.