Table 2.
Characteristics of primary TKA patients with CPNP compared to a sample of matched control patients.
| Variable | CPNP patients (n = 22) | Matched control patients (n = 44) | P value (odds ratio) |
|---|---|---|---|
| Age (mean, SD) | 71, 8 | 72, 8 | >.9 |
| BMI (mean, SD) | 27.6, 4.8 | 28.6, 4.5 | .4 |
| Females (n, %) | 19, 86% | 38, 86% | >.9 |
| ASA (n, %) | .4 | ||
| ASA 1 | 3, 14% | 2, 4.5% | |
| ASA 2 | 16, 73% | 37, 84% | |
| ASA 3 | 3, 14% | 5, 11% | |
| Epidural catheter (n, %) | 17, 77% | 34, 77% | >.9 |
| Use of tourniquet (n, %) | 18, 82% | 36, 82% | >.9 |
| Tourniquet time in min (mean, SD) | 76, 28 | 59, 14 | .005 |
| Tourniquet pressure in mmHg (mean, SD) | 271, 16 | 271, 11 | .8 |
| FTA (mean, SD) | 11, 10 | 4, 8 | .004 |
| <6° (n, %) | 7, 32% | 28, 64% | |
| 6°-11° (n, %) | 4, 18% | 10, 23% | |
| >11° (n, %) | 11, 50% | 6, 14% | .003 (6.1) |
ASA, American Society of Anesthesiologists; FTA, femorotibial angle.