Table 1 Comparison of the effect of gender, age, BMI, the surgeon’s experience, OA grade and OA symptom duration on the primary outcome measurements, FO and LLD
Femoral-offset restoration | OR | 95% CI | p-value |
Gender | |||
 Male | 1.00 | Ref |  |
 Female | 0.70 | 0.39 to 1.27 | 0.24 |
Age | 0.99 | 0.96 to 1.02 | 0.71 |
BMI | 1.01 | 0.95 to 1.01 | 0.71 |
Surgeon | |||
 Consultant | 1.00 | Ref |  |
 Resident | 1.56 | 0.79 to 3.10 | 0.19 |
OA grade | |||
 K-L grade 1–2 | 1.00 | Ref |  |
 K-L grade 3–4 | 0.90 | 0.50 to 1.60 | 0.72 |
OA duration | |||
  < 3 years | 1.00 | Ref |  |
  ≥ 3 years | 0.73 | 0.40 to 1.33 | 0.31 |
Leg length discrepancy | OR | 95% CI | p-value |
Gender | |||
 Male | 1.00 | Ref |  |
 Female | 0.66 | 0.28 to 1.54 | 0.34 |
Age | 0.99 | 0.95 to 1.05 | 0.88 |
BMI | 1.14 | 1.04 to 1.25 | 0.005 |
Surgeon | |||
 Consultant | 1.00 | Ref |  |
 Resident | 0.90 | 0.33 to 2.44 | 0.84 |
OA grade | |||
 K-L grade 1–2 | 1.00 | Ref |  |
 K-L grade 3–4 | 0.75 | 0.33 to 1.69 | 0.49 |
OA duration | |||
  < 3 years | 1.00 | Ref |  |
  ≥ 3 years | 0.94 | 0.41 to 2.20 | 0.89 |