Evaluation of Observable Items of Gait Abnormality in Patients with Postoperative Hip Osteoarthritis Patients: Criterion-Related Validity between Observational Evaluation and Three-dimensional Gait Analysis Data

Abstract

Objective: This study aimed to examine the content validity of observational evaluations of gait abnormality in patients with postoperative hip osteoarthritis (hip OA) and then verify the criterion-related validity of these evaluations.

Methods: Items of gait abnormality were pooled for observational assessment. The content validity of 3-point scales was examined by opinions from four experts in hip OA. Criterion-related validity was verified using data extracted from a three-dimensional gait analysis.

Results: Of the seven observational evaluation items that were supported for content validity. Four items related to criterionrelated validity were verified using data extracted from the three-dimensional gait analysis.

Conclusion: The four items, ‘I: Foot condition at heel ground contact (ankle joint angle)', ‘III: Trunk condition to mid-stance (symmetry of lateral translation)', ‘V: Hip joint condition at mid-stance on the affected side (hip adduction angle)', and ‘VI: Hip joint condition at heel release on the affected side (hip extension angle)', have the potentiality for observational evaluation in clinical practice.