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Comparison of baseline characteristics of patients in four groups.
| Characteristics | Group A (n = 20, 20 hips) | Group B (n = 19, 20 hips) | Group C (n = 19, 20 hips) | Group D (n = 20, 20 hips) | P |
|---|---|---|---|---|---|
| Sex (male/female) | 8/12 | 8/11 | 6/13 | 8/12 | 0.443 |
| Mean age (years) | 60.40 ± 9.60 | 62.40 ± 15.62 | 69.35 ± 10.04 | 65.75 ± 11.42 | 0.98 |
| BMI (kg/m2) | 24.26 ± 2.84 | 24.21 ± 2.63 | 24.43 ± 3.13 | 25.34 ± 2.80 | 0.57 |
| Diagnosis (femoral neck fracture/femoral head necrosis), case | 9/11 | 12/8 | 12/8 | 10/10 | 0.715 |
