Table 1.
Preoperative Characteristics for Total Sample and UKA, TKA, and PFA Groupsa
| Characteristic | Total | UKA | TKA | PFA | P Value |
|---|---|---|---|---|---|
| Number | 115 | 46 | 46 | 23 | |
| Sex | ≥.999 | ||||
| Male | 15 (13.0) | 6 (13.0) | 6 (13.0) | 3 (13.0) | |
| Female | 100 (87) | 40 (87.0) | 40 (87.0) | 20 (87.0) | |
| Surgery side | |||||
| Right | 72 (62.6) | 25 (54.3) | 30 (65.2) | 17 (73.9) | .255 |
| Left | 43 (37.4) | 21 (45.7) | 16 (34.8) | 6 (26.1) | |
| Medial or lateral | |||||
| Medial | — | 29 (63.0) | — | — | .105 |
| Lateral | — | 17 (37.0) | — | — | |
| Age category | |||||
| ≤55 y | 55 (47.8) | 22 (47.8) | 22 (47.8) | 11 (47.8) | ≥.999 |
| 56-60 y | 25 (21.7) | 10 (21.7) | 10 (21.7) | 5 (21.7) | |
| 61-65 y | 15 (13.0) | 6 (13.0) | 6 (13.0) | 3 (13.0) | |
| >65 y | 20 (17.5) | 8 (17.5) | 8 (17.5) | 4 (17.4) | |
| Prior surgery | 38 (33.0) | 15 (32.6) | 14 (30.4) | 9 (39.1) | .767 |
| Body mass index | 27.9 ± 5.6 | 27.11 ± 4.8 | 28.1 ± 5.9 | 29.2 ± 6.3 | .392 |
| No. of impact sports | |||||
| Low impact | 2.89 ± 1.8 | 3.09 ± 2.1 | 3.26 ± 1.3 | 1.74 ± 1.5 | .002 |
| Medium impact | 1.31 ± 1.1 | 1.52 ± 1.2 | 1.41 ± 1.0 | 0.69 ± 0.8 | .007 |
| High impact | 0.58 ± 0.9 | 0.7 ± 1.1 | 0.48 ± 0.7 | 0.56 ± 0.9 | .519 |
| UCLA | |||||
| Continuous score | 5.45 ± 2.4 | 5.93 ± 2.5 | 5.26 ± 2.4 | 4.87 ± 2.1 | .177 |
| Score ≥7 | 38 (33.0) | 15 (32.6) | 18 (39.2) | 5 (21.7) | .350 |
| Score <7 | 77 (67.0) | 31 (67.4) | 28 (61.8) | 18 (78.3) | |
| HAAS total | 8.4 ± 3.8 | 9.91 ± 3.8 | 7.13 ± 3.4 | 7.9 ± 3.68 | .001 |
| NRS | 65.3 ± 19.0 | 69.4 ± 17.1 | 60.1 ± 20.4 | 66.59 ± 18.6 | .072 |
aValues are expressed as n (%) or mean ± SD. —, not applicable. HAAS, High Activity Arthroplasty Score; NRS, Numeric Rating Scale for pain; PFA, patellofemoral arthroplasty; TKA, total knee arthroplasty; UCLA, University of California, Los Angeles activity score; UKA, unicompartmental knee arthroplasty.