Table 2 Differences in patient data and preoperative hip joint geometry between stem types
Group I (Proxy®) N = 99 Count (%) | Group II (Optimys®) N = 62 Count (%) | Group III (Corail®) N = 90 Count (%) | P-value | P-value (t-test) | ||
|---|---|---|---|---|---|---|
Age (mean + SD) | 60.3 ± 7.8 | 64.3 ± 10.8 | 62.3 ± 11.4 | 0.047 | I vs II: 0.014 I vs III: 0.177 II vs III: 0.220 | |
Gender | Male | 54 (54.6) | 34 (54.8) | 42 (46.7) | 0.478 | |
Female | 45 (45.4) | 28 (45.2) | 48 (53.3) | |||
BMI (mean + SD) | 28.5 ± 4.9 | 26.8 ± 4.0 | 27.6 ± 3.8 | 0.047 | I vs II: 0.015 I vs III: 0.133 II vs III: 0.285 | |
Side | Left | 46 (46.5) | 30 (48.4) | 41 (45.6) | 0.942 | |
Right | 53 (53.5) | 32 (51.6) | 49 (54.4) | |||
ASA | 1 | 11 (11.5) | 7 (11.5) | 7 (7.8) | 0.066 | |
2 | 60 (62.5) | 36 (59.0) | 41 (45.6) | |||
3 | 22 (22.9) | 18 (29.5) | 37 (41.1) | |||
4 | 3 (3.1) | 0 (0.0) | 5 (5.6) | |||
Primary Osteoarthritis | No | 10 (10.1) | 7 (11.3) | 18 (20.0) | 0.115 | |
Yes | 89 (89.9) | 55 (88.7) | 72 (80.0) | |||
Hip Type | Coxa vara (CCD < 125°) | 32 (32.3) | 23 (37.1) | 27 (30.0) | 0.131 | |
Coxa norma (CCD 125°-135°) | 43 (43.4) | 34 (54.8) | 45 (50.0) | |||
Coxa valga (CCD > 135°) | 24 (24.2) | 5 (8.1) | 18 (20.0) | |||
Duration of surgery (minutes; mean + SD) | 40.2 ± 12.5 | 45.5 ± 15.7 | 75.4 ± 27.9 | < 0.001 | I vs II: 0.106 I vs III: < 0.001 II vs III: < 0.001 | |
Preoperative CCD Angle (mean + SD; in degrees) | 129.3 ± 7.3 | 127.2 ± 6.1 | 128.1 ± 7.2 | 0.167 | ||
Preoperative Femoral Offset (mean + SD; in mm) | 39.3 ± 7.1 | 39.0 ± 5.8 | 36.6 ± 7.4 | 0.021 | I vs II: 0.773 I vs III: 0.009 II vs III: 0.042 | |
Preoperative Acetabular Offset (mean + SD; in mm) | 36.1 ± 5.0 | 37.2 ± 3.8 | 35.2 ± 4.7 | 0.040 | I vs II: 0.130 I vs III: 0.228 II vs III: 0.011 | |
Preoperative Total Offset (mean + SD; in mm) | 75.3 ± 9.3 | 76.2 ± 6.4 | 71.9 ± 8.4 | 0.002 | I vs II: 0.545 I vs III: 0.004 II vs III: 0.002 | |