Table 5. Univariate and Multivariate Analysis of Variables Associated with Early Failure after FNS Fixation for Femoral Neck Fractures (n = 40).
| Variable | Univariate analysis | Multivariate analysis | |||
|---|---|---|---|---|---|
| Odds ratio (95% CI) | p-value | Odds ratio (95% CI) | p-value | ||
| Age (yr) | 1.04 (0.95–1.14) | 0.418 | |||
| Female sex | 0.90 (0.11–7.06) | 0.916 | |||
| Osteoporosis | 1.91 (0.18–20.23) | 0.591 | |||
| Location | |||||
| Subcapital | Reference | - | - | NS | |
| Transcervical | 7.50 (0.70–80.96) | 0.097 | - | NS | |
| Basicervical | - | NS | - | NS | |
| Garden classification | |||||
| Non-displaced (type I, II) | Reference | - | - | NS | |
| Displaced (type III, IV) | 4.00 (1.13–14.18) | 0.032 | - | NS | |
| Pauwels classification | |||||
| Type I & II | Reference | - | |||
| Type III | 2.25 (0.69–7.30) | 0.177 | |||
| Comminuted fragment | |||||
| Present | 3.33 (0.92–12.11) | 0.067 | - | NS | |
| Garden alignment (AP) | |||||
| Poor | - | NS | |||
| Garden alignment (lateral) | |||||
| Poor | 9.00 (3.20–25.29) | < 0.001 | - | NS | |
| Lowell’s criteria | |||||
| Broken S | 6.00 (1.77–20.37) | 0.004 | - | NS | |
| Poor implant position | 3.67 (0.29–47.11) | 0.319 | |||
| CT reduction status | |||||
| Displacement > 2 mm | 1.33 (0.30–5.96) | 0.706 | |||
| TAD (mm) | 1.13 (1.06–1.20) | < 0.001 | - | NS | |
| Sliding distance (mm) | 1.91 (1.19–3.07) | 0.008 | 1.79 (1.10–2.90) | 0.019 | |
| FNS implant | |||||
| 1-Hole | 2.57 (1.70–3.87) | 0.033 | - | NS | |
FNS: Femoral Neck System (DePuy Synthes), CI: confidence interval, NS: not significant, AP: anteroposterior, CT: computed tomography, TAD: tip-apex distance.