Table 1 Baseline demographics and clinical characteristics of the patient population
Parameters | Simultaneous bilateral TKA (n = 49) | Staged bilateral TKA (n = 52) | Unilateral TKA (n = 101) | All TKA patients (n = 202) |
|---|---|---|---|---|
Age (years) | 68.9 ± 7.9 | 68.9 ± 7.1 | 69.8 ± 6.7 | 69.4 ± 7.1 |
Male/female | 17/32 | 20/32 | 37/64 | 74/1128 |
Height (m) | 1.65 ± 0.07 | 1.64 ± 0.08 | 1.65 ± 0.07 | 1.65 ± 0.07 |
Weight (kg) | 70.98 ± 8.55 | 70.49 ± 7.25 | 72.31 ± 8.95 | 71.52 ± 8.44 |
BMI (kg/m2) | 26.15 ± 2.74 | 26.45 ± 3.43 | 26.49 ± 3.14 | 26.40 ± 3.12 |
BMI category | ||||
Normal weight (18.50–24.99) | 17 (34.7%) | 21 (40.4%) | 32 (31.7%) | 70 (34.7%) |
Overweight (25.00–29.99) | 29 (59.2%) | 23 (44.2%) | 58 (57.4%) | 110 (54.5%) |
Obese I (30.00–34.99) | 3 (6.1%) | 8 (15.4%) | 9 (8.9%) | 20 (9.9%) |
Obese class II (35.00–35.99) | 0 | 0 | 2 (2.0%) | 2 (1.0%) |
Charlson-Deyo comorbidity index | ||||
0 | 28 | 36 | 41 | 105 (52.0%) |
1 to 2 | 21 | 15 | 58 | 94 (46.5%) |
≥ 3 | 0 | 1 | 2 | 3 (1.5%) |
Total WOMAC score | 56.1 ± 4.5 | 57.0 ± 3.9 | 56.0 ± 3.9 | 56.3 ± 4.0 |
WOMAC pain score | 13.1 ± 2.1 | 13.6 ± 2.1 | 12.5 ± 2.5 | 12.9 ± 2.3 |
WOMAC stiffness score | 3.6 ± 1.3 | 3.9 ± 1.3 | 3.1 ± 1.5 | 3.4 ± 1.4 |
WOMAC function score | 39.3 ± 3.5 | 39.4 ± 3.3 | 40.4 ± 3.8 | 39.9 ± 3.6 |
SF-36 PCS score | 35.0 ± 4.5 | 35.1 ± 5.3 | 36.0 ± 4.6 | 35.5 ± 4.8 |
SF-36 MCS score | 45.6 ± 5.0 | 45.5 ± 6.2 | 44.4 ± 3.7 | 45.0 ± 4.8 |