Demographic and clinical characteristics of patients with and without walking limitations (defined as a maximum walk time ≤ 15 min). Values appearing as “A, B, C” represent (A) the lower quartile, (B) the median, and (C) the upper quartile for continuous variables. Values appearing as D ± E are mean ± 1 SD.
| Characteristics | Missing, % (n) | Walking Limitations, n = 135 | No Walking Limitations, n = 961 | Overall, n = 1096 |
|---|---|---|---|---|
| Age, yrs | 0 | 61.5, 69.7, 75.0 (68.4 ± 9.0) | 61.2, 66.2, 72.0 (66.7 ± 7.4) | 61.2, 66.7, 72.5 (66.9 ± 7.6) |
| Women, % (n) | 0 | 77 (104) | 75 (719) | 75 (823) |
| BMI, kg/m2 | 0 | 25.1, 28.8, 32.1 (28.9 ± 5.1) | 24.2, 26.9, 30.0 (27.3 ± 4.4) | 24.3, 27.0, 30.1 (27.5 ± 4.5) |
| Hypertension, % (n) | 0 | 76 (102) | 68 (657) | 69 (759) |
| Falls history, % (n) | 4.9 (54) | |||
| None | 87 (114) | 89 (812) | 89 (926) | |
| Once | 8 (10) | 6 (59) | 7 (69) | |
| Recurrent | 5 (7) | 4 (40) | 5 (47) | |
| Preop walking aids, % (n) | 0.9 (10) | |||
| None | 50 (68) | 73 (693) | 70 (761) | |
| Stick | 32 (43) | 22 (211) | ||
| QuadStick | 11 (15) | 3 (27) | 4 (42) | |
| Frame | 7 (9) | 2 (20) | 3 (29) | |
| Contralateral knee pain, % (n) | 0.5 (6) | 67 (90) | 56 (532) | 57 (622) |
| Adult reconstruction specialist, % (n) | 0 | 55 (74) | 59 (571) | 59 (645) |
| Preop walking limitations, % (n) | 0 | |||
| > 30 mins | 5 (7) | 21 (199) | 19 (206) | |
| 16–30 mins | 17 (23) | 31 (300) | 29 (323) | |
| 5–15 mins | 50 (67) | 40 (389) | 42 (456) | |
| Around house | 28 (38) | 8 (73) | 10 (111) | |
| Week 4 fast gait speed, m/s, % (n) | 30 (326) | 0.54, 0.74, 0.87 (0.71 ± 0.29) | 0.69, 0.88, 1.08 (0.89 ± 0.28) | 0.68, 0.87, 1.06 (0.87 ± 0.29) |
| Week 4 knee pain, % (n) | 30 (326) | 0.00, 0.00, 1.00 (0.78 ± 1.38) | 0.00, 0.00, 0.00 (0.52 ± 1.34) | 0.00, 0.00, 0.00 (0.55 ± 1.35) |
BMI: body mass index; Preop: preoperative.