Table 1 Preoperative patient demographic and clinical characteristics
Characteristics | PFC Sigma (n = 59) | ATTUNE (n = 54) | p-value |
|---|---|---|---|
Age (years), mean ± SD | 70.0 ± 8.2 | 73.4 ± 7.2 | 0.023 |
(min, max) | (54.0, 86.0) | (54.0, 87.0) | |
Female sex, n (%) | 51 (86.4%) | 50 (92.6%) | 0.367 |
Body mass index (kg/m2), mean ± SD | 26.5 ± 4.9 | 26.2 ± 3.7 | 0.679 |
(min, max) | (16.9, 39.6) | (19.0, 38.9) | |
Right side, n (%) | 30 (50.8%) | 23 (42.6%) | 0.452 |
Charlson Comorbidity Index, n (%) | 0.114 | ||
0–3 | 35 (59.3%) | 24 (44.4%) | |
> 3 | 24 (40.7%) | 30 (55.6%) | |
Preoperative use of gait aid, n (%) | 0.098 | ||
None | 33 (56.0%) | 20 (37.0%) | |
Cane | 13 (22.0%) | 17 (31.5%) | |
Walker | 12 (20.3%) | 17 (31.5%) | |
Wheel chair | 1 (1.7%) | 0 (0.0%) | |
Preoperative Hip knee axis (degrees), mean ± SD | 170.0 ± 10.9 | 169.8 ± 8.1 | 0.912 |
(min, max) | (149.0, 199.0) | (153.0, 197.0) | |
Varus alignment, n (%) | 47 (79.7%) | 45 (83.3%) | |
Valgus alignment, n (%) | 7 (11.9%) | 2 (3.7%) | |
Preoperative range of motion (degrees), mean ± SD | 102.5 ± 18.2 | 100.5 ± 16.3 | 0.538 |
(min, max) | (30.0, 140.0) | (50.0, 130.0) | |
Preoperative modified knee score, mean ± SD | 44.9 ± 11.4 | 44.9 ± 10.2 | 0.978 |
(min, max) | (7.0, 67.0) | (25.0, 70.0) | |