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Reliability and validity of the Hartofilakidis classification system of congenital hip disease in adults
C K Yiannakopoulos1, T Xenakis, T Karachalios
1First Orthopaedic Department, University of Athens Medical School, Athens, Greece. cky@ath.forthnet.gr
Insights
The Hartofilakidis classification system for congenital hip disease (CHD) shows high reliability and validity. Surgeons can confidently use preoperative X-rays to predict intraoperative findings in adult CHD patients.
Area of Science:
- Orthopedics
- Radiology
- Surgical Assessment
Background:
- Congenital hip disease (CHD) requires accurate classification for effective treatment.
- Existing classification systems may have limitations in adult populations.
- The Hartofilakidis et al. system is a proposed method for assessing CHD.
Purpose of the Study:
- To evaluate the reliability and validity of the Hartofilakidis et al. classification system.
- To determine the system's accuracy in predicting intraoperative findings in adults with CHD.
- To assess interobserver agreement among surgeons using the classification.
Main Methods:
- Retrospective review of 102 adult patients (158 hips) with CHD.
- Independent assessment of radiographs by three senior surgeons.
- Comparison of preoperative radiographic assessments with intraoperative findings (reference standard).
Main Results:
- High interobserver agreement among surgeons (0.720–0.854, substantial to excellent).
- Excellent agreement between preoperative predictions and intraoperative findings (87.4%, K = 0.823).
- The classification system reliably predicts bone deficiencies from preoperative radiographs.
Conclusions:
- The Hartofilakidis et al. classification system is a reliable and valid tool for adults with CHD.
- Preoperative radiographic assessment using this system accurately predicts intraoperative conditions.
- This system enhances surgical planning and patient management for adult CHD.
Abstract:
The reliability and validity of the Hartofilakidis et al. classification system in adults with congenital hip disease (CHD) were examined. The radiographs of 102 adult patients (158 hips) with CHD were independently assessed by three senior surgeons. Interobserver variability was assessed by examining the agreement between the three raters while validity of the classification system was assessed by examining the agreement between the assessment by either one of the three raters and the intraoperative finding (reference standard). The interobserver agreement between the three observers was high ranging from 0.720 to 0.854 (substantial to excellent) while the agreement of the preoperative prediction with the intraoperative findings was 87.4% (K = 0.823, excellent agreement). The Hartofilakidis et al. classification system reliably predicts from preoperative pelvis radiographs the bone deficiencies encountered during the operation.
