30 May 2026 : Clinical Research
Improved Prediction of Femoral Shortening in Total Hip Arthroplasty for Developmental Dysplasia of the Hip Using the Etfal Classification: A 7-Center Validation Study
Hakan Şeşen
ABDEF 1, Yüksel Uğur Yaradılmış ABCDE 2*
DOI: 10.12659/MSM.952198
Med Sci Monit 2026; 32:e952198
Table 2 Optimal cut-off values for each calssification.
| Cut-off | Sensitivity | Specificity | Interpretation |
|---|---|---|---|
| Etfal ≥2 | 1.00 | 0.81 | High sensitivity; no surgical need missed |
| Etfal ≥3 | 0.82 | 0.99 | Excellent specificity; near-perfect rule-in value |
| Etfal ≥4 | 0.28 | 1.00 | Too strict for clinical use |
| Crowe ≥2 | 1.00 | 0.29 | Classifies too many patients as high-risk |
| Crowe ≥3 | 1.00 | 0.60 | Overly broad and clinically imprecise |
| Crowe ≥4 | 0.96 | 0.89 | Reasonably well but only for severe dysplasia |