Table 2 Comparative statistical analysis of three groups
ITST (n = 60) | PFNA (N = 57) | U-Blade (n = 68) | P value | |
|---|---|---|---|---|
Age (years) | 78.5 ± 7.0 | 79.5 ± 7.0 | 79.2 ± 7.5 | 0.187 |
Gender (female:male) | 44:16 | 42:15 | 51:17 | 0.977 |
AO classification | ||||
31 A1 | 38 | 24 | 21 | 1.000 |
31 A2 | 22 | 31 | 41 | |
31 A3 | 0 | 2 | 6 | |
BMI (kg/m2) | 22.8 ± 3.9 | 21.4 ± 3.9 | 22.2 ± 3.9 | 0.162 |
BMD (T score) | − 2.6 ± 1.3 | − 2.8 ± 1.4 | − 2.7 ± 1.2 | 1.000 |
Basicervical fracture type on 3D-CT | 6 (10%) | 5 (8.7%) | 9 (13.2%) | 0.145 |
GT comminution on 3D-CT | 37 (61.7%) | 37 (64.9%) | 39 (57.4%) | 0.684 |
TAD of lag screw (mm) | 19.9 ± 0.98 | 19.2 ± 5.02 | 18.1 ± 4.45 | 0.835 |
Sliding distance of lag screw (mm) | 5.6 ± 3.6 | 3.3 ± 3.6 | 3.8 ± 3.1 | 0.017 |
Excessive sliding over 10 mm | 3 | 0 | 3 | 0.247 |
Varus change (°) | 2.3° ± 6.08 | 1.3° ± 1.20 | 2.2° ± 5.46 | 0.762 |
Excessive change over 10° | 4 | 2 | 3 | 0.634 |
Position of lag screw | ||||
Centric | 45 | 43 | 53 | 0.914 |
Eccentric | 15 | 14 | 15 | |
Reduction quality | ||||
Anatomical | 43 | 43 | 53 | 0.572 |
Non-anatomical | 17 | 14 | 15 | |
Fixation failure | 3 (5.0%) | 4 (7.0%) | 1 (1.5%) | 0.301 |
Cause of failure | ||||
Cut-out | 3 | 0 | 1 | 0.092 |
Cut-through | 0 | 3 | 0 | |
Nail breakage | 0 | 1 | 0 | |
Walking ability recovery (Koval grade) | 52.7% | 46.8% | 49.8% | 0.732 |