From: Proximal femoral anatomy and collared stems in hip arthroplasty: is a single collar size sufficient?
Female hips (n = 54) | Males hips (n = 150) | p-value | ||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|
Mean | ±SD | Median | Range | Mean | ±SD | Median | Range | |||||
Age | (yrs) | 74.8 | ±12.6 | 77.0 | (41.0 | - 93.0) | 66.2 | ±11.2 | 66.0 | (35.0 | - 89.0) | <0.001 |
Femoral Head Diameter | (mm) | 43.8 | ±2.4 | 44.5 | (38.0 | - 48.0) | 49.1 | ±2.6 | 49.0 | (43.0 | - 56.0) | <0.001 |
Cortical distance | (mm) | 8.6 | ±2.0 | 9.0 | (3.0 | - 13.0) | 10.7 | ±2.6 | 10.0 | (5.0 | - 24.0) | <0.001 |
Medio-lateral Offset | (mm) | 40.5 | ±4.3 | 39.8 | (31.3 | - 51.2) | 45.3 | ±5.1 | 45.1 | (32.7 | - 65.0) | <0.001 |
Stem size | (1–10) | 3.7 | ±1.7 | 3.0 | (1.0 | - 8.0) | 5.7 | ±1.7 | 6.0 | (2.0 | - 9.0) | <0.001 |
Femoral Neck Angle | (deg) | 126.2 | ±5.8 | 125.9 | (112.3 | - 136.4) | 124.9 | ±5.6 | 124.8 | (110.5 | - 140.8) | 0.165 |
Varus Stem Model | 40.7% | 40.7% |