Abstract
Objective
To identify an assessment tool and its cut-off point for indicating ambulatory status 6 months after total hip arthroplasty (THA).
Design
Cross-sectional study.
Setting
Kyoto University Hospital.
Participants
Eighty-eight patients who underwent unilateral THA.
Main outcome measure
Lower-extremity muscle strength, hip range of motion and hip pain were measured 6 months after THA. The patients were divided into two groups according to their ability to walk 6 months after THA: an independent ambulation group and a cane-assisted ambulation group.
Results
A stepwise multiple logistic regression analysis indicated that age and lower-extremity maximal load were significant variables affecting mid-term ambulatory status following THA. Receiver operating characteristic curve analyses revealed that ambulatory status following THA was indicated more accurately by leg extension strength (cut-off point = 8.24 N/kg, sensitivity = 92%, specificity = 82%, area under the curve = 0.93) than age.
Conclusion
Lower-limb load force with a cut-off point of 8.24 N/kg is a reliable assessment tool for indicating ambulatory status 6 months after primary THA.
Citation
Factors associated with ambulatory status 6 months after total hip arthroplasty; Nankaku, M. et al. Physiotherapy, Volume 100, Issue 3, 263 - 267;