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| Outcome | Percent difference | 95% confidence intervals | P value | |
|---|---|---|---|---|
| Lower | Upper | |||
| Operative time (minutes) | −11.3% | −12.4% | −10.4% | <0.001 |
| Length-of-stay (days) | −46.3% | −47.1% | −45.6% | <0.001 |
Multiple linear regression models using log-transformed dependent variables adjusted for year of surgery, sex, age, BMI, and American Society of Anesthesiologists (ASA) score. TKA, total knee arthroplasty.
