Table 1 The relationship between different influencing factors and the malalignment of the femoral stem
Factors | Variable declaration | Femoral stem malalignment (n = 47) | Neutral position (n = 66) | χ2 or t value | P value |
|---|---|---|---|---|---|
Gender | Male | 22 (46.80) | 30 (45.50) | 0.02 | 0.88 |
| Â | Female | 25 (53.20) | 36 (54.50) | Â | Â |
Age (years) |  | 56 ± 14 | 58 ± 14 | 0.96 | 0.34 |
BMI |  | 23.88 ± 2.99 | 25.17 ± 3.78 | 1.95 | 0.05 |
Pelvic morphology | <3 | 13 (27.70) | 15 (22.70) | 0.36 | 0.55 |
| Â | >3 | 34 (72.30) | 51 (77.30) | Â | Â |
FAR ratio | <1 | 20 (42.60) | 42 (63.60) | 4.93 | 0.03* |
| Â | >1 | 27 (57.40) | 24 (36.40) | Â | Â |
Preoperative diagnoses | Osteoarthritis | 35 (74.50) | 48 (72.80) | 4.90 | 0.17 |
Avascular necrosis | 9 (19.10) | 15 (22.70) | Â | Â | |
Femoral neck fracture | 3 (6.40) | 2 (3.00) | Â | Â | |
Rheumatoid arthritis | 0 | 1 (1.50) | Â | Â | |
Dorr classification | Type A | 6 (12.80) | 8 (12.10) | 0.01 | 0.92 |
Type B | 41 (87.20) | 58 (87.90) | Â | Â | |
Last follow-up WOMAC |  | 26.11 ± 3.20 | 26.41 ± 4.33 | 0.41 | 0.69 |