Physical Performance Tests Correlate With Patient-reported Outcomes After Periacetabular Osteotomy: A Prospective...

Area of Science:

• Orthopedics and Sports Medicine
• Rehabilitation and Physical Therapy
• Biomedical Engineering

Background:

• Hip dysplasia often leads to significant functional disability.
• Periacetabular osteotomy (PAO) is a surgical intervention to improve function.
• Validated physical performance measures (PPMs) exist, but their utility post-PAO is unestablished.

Purpose of the Study:

• To assess the responsiveness of four PPMs up to one year after PAO.
• To compare PPMs with established hip-specific patient-reported outcome (PRO) measures.
• To evaluate the acceptability and utility of PPMs for outcome assessment post-PAO.

Main Methods:

• Twenty-two participants (15-39 years) underwent four PPMs and seven PRO measures pre- and post-PAO (6 months, 1 year).
• Statistical analyses included Wilcoxon rank sum, t-tests, Spearman correlation, and generalized linear modeling.
• Participant feedback on PPM and PRO acceptability and utility was collected.

Main Results:

• Significant improvements were observed in PROs (6 months) and STS5 (6 months) and TSA (1 year) post-PAO.
• The sit-to-stand five times (STS5) and timed stair ascent (TSA) tests showed moderate to strong correlations with PRO measures.
• PPM testing was universally accepted, with most participants finding them equally useful as PRO measures.

Conclusions:

• The STS5 and TSA tests are responsive and correlate well with PROs after PAO for hip dysplasia.
• These PPMs can serve as valuable functional outcome measures to complement existing PRO instruments.
• PPMs are acceptable and useful tools for assessing recovery and functional gains following PAO.