Table 3.
Perioperative results
| Variable | UKA group | TKA group | p Value |
|---|---|---|---|
| Operative time (minutes) | 76 (±17.1; 48–157) | 81 (±21.8; 49–181) | 0.1015 |
| Estimated blood loss (cc) | 52 (±25.9; 25–250) | 51 (±17.7; 20–100) | 0.7554 |
| Hemoglobin level at discharge (g/dL) | 12.1 (±1.2; 9.5–14.9) | 11.3 (±1.1; 8.6–13.7) | 0.0000 |
| Length of stay (days) | 1.4 (±0.7; 1–4) | 2.2 (±0.9; 1–4) | 0.0000 |
| Range of motion at discharge (degrees) | 77 (±18.4; 40–120) | 68 (±11.4; 40–95) | 0.0000 |
| Walking distance at discharge (feet) | 187 (±93; 20–500) | 137 (±76; 8–400) | 0.0000 |
| Transfers | |||
| Independent or standby assistance | 84 (73%) | 69 (60%) | 0.0030 |
| Contact guard or moderate assistance | 15 (13%) | 34 (30%) | |
| Not noted | 16 (14%) | 12 (10%) | |
| Physical therapy goals at discharge | |||
| Goals met | 72 (63%) | 49 (43%) | 0.0001 |
| Goals not met | 24 (21%) | 53 (46%) | |
| Not noted | 19 (16%) | 13 (11%) | |
| Disposition upon discharge | |||
| Home, with outpatient or no physical therapy ordered | 77 (67%) | 63 (55%) | 0.0124 |
| Home, with in home physical therapy | 24 (21%) | 24 (21%) | |
| Skilled nursing/rehabilitation facility | 26 (23%) | 6 (5%) | 0.0002 |
| Not noted | 2 (2%) | 8 (7%) | |
| 6-week range of motion (degrees) | 115 (±11.4; 75–135) | 110 (±13.1; 50–125) | 0.0016 |
| 6-week KS pain score (0 to 50) | 38 (±11.3; 0–50) | 38 (±11.0; 10–50) | 0.6978 |
| 6-week KS clinical score (0 to 100) | 85 (±12.4; 45–100) | 84 (±12.8; 40–100) | 0.4680 |
| 6-week KS functional score (−20 to 100) | 63 (±20.9; 45–100) | 55 (±19.0; 30–100) | 0.0015 |
UKA = unicompartmental knee arthroplasty; TKA = total knee arthroplasty; KS = Knee Society.
Bolded values are p = 0.05 or lower.