Table 1.
Demographic characteristic of included patients
| Unmatched group | P value | Propensity-matched group | P value | |||
|---|---|---|---|---|---|---|
| ABN group | CON group | ABN group | CON group | |||
| Number of cases/ knees | 27/33 | 274/299 | 21/24 | 77/78 | ||
| Age (years) | 70.52 ± 6.50 | 69.36 ± 7.00 | 0.368 | 71.04 ± 6.75 | 69.18 ± 7.33 | 0.270 |
| Gender (female) | 31 (93.9%) | 234 (78.3%) | 0.033* | 22 (91.7%) | 68 (87.2%) | 0.727 |
| Knee (right) | 16 (48.5%) | 122 (40.8%) | 0.507 | 10 (41.7%) | 35 (44.9%) | 0.967 |
| Prosthesis type | 0.040* | 0.137 | ||||
| LPS-Flex | 29 (87.9%) | 198 (66.2%) | 21 (87.5%) | 51 (65.4%) | ||
| Legion PS | 2 (6.1%) | 53 (17.7%) | 1 (4.2%) | 14 (17.9%) | ||
| Attune PS | 2 (6.1%) | 48 (16.1%) | 2 (8.3%) | 13 (16.7%) | ||
| BMI (kg/m2) | 27.12 ± 2.87 | 26.88 ± 3.72 | 0.718 | 27.80 ± 2.85 | 27.40 ± 3.54 | 0.615 |
| KSKS | 42.24 ± 14.75 | 40.41 ± 16.17 | 0.534 | 40.79 ± 15.21 | 39.79 ± 16.26 | 0.790 |
| KSFS | 46.06 ± 22.94 | 52.93 ± 20.75 | 0.075 | 46.46 ± 19.31 | 49.88 ± 20.97 | 0.478 |
| ROM (°) | 95.15 ± 18.94 | 95.20 ± 19.90 | 0.989 | 95.83 ± 18.51 | 93.08 ± 22.15 | 0.582 |
| MA (°) | 4.38 ± 11.87 | 9.50 ± 11.87 | 0.021* | 7.80 ± 8.76 | 8.04 ± 6.13 | 0.882 |
| FU time (month) | 21.79 ± 1.65 | 21.99 ± 8.03 | 0.754 | 21.88 ± 1.42 | 21.56 ± 8.66 | 0.725 |
Abbreviations: BMI Body mass index, ROM Range of motion, KSKS Knee society knee score, KSFS Knee society function score, MA Mechanical axis (neutral MA = 0°, valgus = negative, varus = positive), FU Follow-up
P value < 0.05 were strengthened by *