Table 2.
Characteristics by articulation.
| Posterior stabilized (n = 157) | Constrained (n = 30) | Total (n = 187) | P value | |
|---|---|---|---|---|
| Gender | .7154a | |||
| Male | 32 (20.4%) | 7 (23.3%) | 39 (20.9%) | |
| Female | 125 (79.6%) | 23 (76.7%) | 148 (79.1%) | |
| Component used | .5458a | |||
| Stryker | 89 (56.7%) | 15 (50.0%) | 104 (55.6%) | |
| Zimmer | 65 (41.4%) | 15 (50.0%) | 80 (42.8%) | |
| Biomet | 3 (1.9%) | 0 (0.0%) | 3 (1.6%) | |
| Lateral release | <.0001b | |||
| Mean (SD) | 2.2 (1.0) | 3.4 (0.7) | 2.4 (1.1) | |
| Age at surgery | .5048b | |||
| Mean (SD) | 70.0 (9.3) | 71.8 (6.7) | 70.3 (9.0) | |
| Millimeter to mechanical axis from midline | <.0001b | |||
| Mean (SD) | 22.8 (13.2) | 42.2 (20.6) | 25.9 (16.2) | |
| Anatomic tibiofemoral angle | <.0001b | |||
| Mean (SD) | 13.1 (3.4) | 18.7 (5.0) | 14.1 (4.2) | |
| Mechanical hip-knee-ankle angle | <.0001b | |||
| Mean (SD) | 6.2 (3.4) | 11.0 (4.9) | 7.0 (4.1) | |
| Preoperative mechanical femoral condylar angle | .0122b | |||
| Mean (SD) | 4.8 (1.9) | 6.0 (2.6) | 5.0 (2.0) | |
| Preoperative anatomic femoral condylar angle | .0491b | |||
| Mean (SD) | 11.1 (2.2) | 11.8 (4.4) | 11.2 (2.6) | |
| Preoperative mechanical tibial condylar angle | <.0001b | |||
| Mean (SD) | 1.8 (1.4) | 3.8 (2.5) | 2.1 (1.8) | |
| Preoperative anatomic tibial condylar angle | <.0001b | |||
| Mean (SD) | 2.0 (1.7) | 5.0 (3.3) | 2.5 (2.3) | |
| Postoperative mechanical hip-knee-ankle angle | .0913b | |||
| Mean (SD) | −0.1 (2.8) | −0.9 (3.2) | −0.3 (2.9) |
SD, standard deviation.
a
Chi-square test.
b
Wilcoxon test.