Table 2.
Patient characteristics before propensity score matching.
| Parameter | UKA | TKA | Significance |
|---|---|---|---|
| Total Surgeries (%) | 68,445 | 2,538,480 | - |
| Average Age (y) | 63.23 (Std d.10.6) | 66.76 (Std d.9.416) | p < 0.0001 |
| Female (%) | 50.5 | 61.7 | p < 0.0001 |
| Payer—Medicare (%) | 40.8 | 57.3 | p < 0.0001 |
| Payer—Medicaid (%) | 5.1 | 4.3 | |
| Payer—Private (%) | 48.5 | 34.9 | |
| Payer—Other (including self-pay) (%) | 5.6 | 3.5 | |
| Hypertension Diagnosis (%) | 52.2 | 59.5 | p < 0.0001 |
| Dyslipidemia Diagnosis (%) | 42.4 | 46.6 | p < 0.0001 |
| Sleep Apnea Diagnosis (%) | 12.4 | 13.2 | p < 0.0001 |
| Chronic Anemia (%) | 2.8 | 5.9 | p < 0.0001 |
| Alcohol Abuse (%) | 0.8 | 0.9 | p = 0.103 |
| Osteoporosis (%) | 2.4 | 4 | p < 0.0001 |
| Parkinson’s Disease (%) | 0.5 | 0.6 | p < 0.0001 |
| Type 2 Diabetes (%) | 16.5 | 21.5 | p < 0.0001 |
| Renal Disease (%) | 4.8 | 7 | p < 0.0001 |
| CHF (%) | 0.7 | 1.3 | p < 0.0001 |
| Chronic Lung Disease (%) | 4.4 | 6.0 | p < 0.0001 |
| Obesity (%) | 25.5 | 31.1 | p < 0.0001 |