Table 3.
Logistic regression analyses to identify factors associated with the preservation of a‐LFCA (n = 172).
| Univariable | Multivariable | |||||||
|---|---|---|---|---|---|---|---|---|
| OR | (95% CI) | p Value | OR | (95% CI) | p Value | |||
| Age | 0.97 | (0.94–1.00) | 0.036 | 0.97 | (0.94–1.00) | 0.036 | ||
| Weight (kg) | 0.97 | (0.95–0.99) | 0.005 | 0.97 | (0.95–0.99) | 0.005 | ||
| Height (cm) | 0.98 | (0.94–1.02) | 0.314 | 1.02 | (0.97–1.09) | 0.435 | ||
| BMI (kg/m2) | 0.90 | (0.83–0.97) | 0.009 | 1.72 | (0.81–3.80) | 0.162 | ||
| Female sex | 2.22 | (1.10–4.60) | 0.029 | 2.22 | (1.10–4.60) | 0.029 | ||
| Indication | ||||||||
| Primary OA | REF | REF | ||||||
| OA secondary to dysplasia | 1.51 | (0.53–5.47) | 0.479 | 3.56 | (0.67–28.89) | 0.171 | ||
| OA secondary to Perthes diseasea | ||||||||
| OA secondary to retroversiona | ||||||||
| Avascular necrosisa | ||||||||
| Kellgren‐Lawrence grade | ||||||||
| Not appropriatea | ||||||||
| 2a | ||||||||
| 3 | 1.32 | (0.61–2.99) | 0.491 | 1.11 | (0.50–2.57) | 0.810 | ||
| 4 | REF | REF | ||||||
| Dorr type | ||||||||
| A | 1.47 | (0.45–6.65) | 0.564 | 1.98 | (0.55–9.46) | 0.332 | ||
| B | REF | REF | ||||||
| Ca | ||||||||
| Acetabular offset (mm) | 0.97 | (0.89–1.05) | 0.413 | 1.00 | (0.92–1.10) | 0.918 | ||
| Femoral offset (mm) | 0.96 | (0.90–1.03) | 0.276 | 0.95 | (0.88–1.03) | 0.233 | ||
| Neck shaft angle (°) | 0.99 | (0.94–1.05) | 0.797 | 0.99 | (0.94–1.05) | 0.797 | ||
| LCEA (°) | 0.99 | (0.94–1.04) | 0.603 | 0.99 | (0.94–1.04) | 0.603 | ||
| GT‐ASIS (mm) | 0.99 | (0.95–1.03) | 0.630 | 1.00 | (0.95–1.04) | 0.836 | ||
| IFD (mm) | 1.02 | (0.97–1.07) | 0.498 | 1.06 | (1.00–1.13) | 0.074 | ||
| IIR | 1.03 | (0.48–2.25) | 0.941 | 2.27 | (0.85–6.62) | 0.116 | ||
| FHEI | 0.31 | (0.00–24.30) | 0.596 | 0.07 | (0.00–17.83) | 0.358 | ||
| Left operated side | 0.78 | (0.39–1.58) | 0.489 | 0.78 | (0.39–1.58) | 0.489 | ||
| Bikini incision | 2.62 | (1.29–5.49) | 0.009 | 3.48 | (0.71–20.18) | 0.137 | ||
| SMS stem | 1.63 | (0.57–5.87) | 0.403 | 1.59 | (0.44–7.28) | 0.505 | ||
| Collared stem | 0.80 | (0.39–1.69) | 0.551 | 0.77 | (0.37–1.66) | 0.501 | ||
| Cup diameter | ||||||||
| 44–48 | 1.04 | (0.46–2.43) | 0.925 | 0.80 | (0.80–2.84) | 0.732 | ||
| 50–54 | REF | REF | ||||||
| 56–62 | 0.52 | (0.20–1.38) | 0.177 | 0.52 | (0.15–1.77) | 0.294 | ||
Note: p Values in bold are statistically significant.
Abbreviations: a‐LFCA, ascending lateral circumflex artery; BMI, body mass index; CI, confidence intervals; FHEI, femoral head extrusion index; GT‐ASIS, distance between the greater trochanter and anterior superior iliac spine; IFD, ischio‐femoral distance; IIR, ilio‐ischial ratio; LCEA lateral centre edge angle; OA, osteoarthritis; OR, odds ratio.
a
Less than five patients in subgroup: insufficient for regression analysis.