Dimensionality of Measures for Severe Unilateral Ankle Arthritis

Abstract

Findings suggest that various outcome measures for the ankle capture different dimensions and should be considered when evaluating the presence of disability or long-term change in outcome.

Early Prospective Clinical Results of a Modern Fixed-Bearing Total Ankle Arthroplasty

“…It is a measure of the pain and disability experienced by the patient when he or she is walking on different surfaces at varying distances, sleeping, or standing 31 . The FADI has demonstrated acceptable reliability, content validity, and moderate responsiveness 32 .…”

Differences in Outcomes Following Total Ankle Replacement in Patients with Neutral Alignment Compared with Tibiotalar Joint Malalignment

“…The FADI consists of twenty-six questions about activities of daily living and involves the subject's perception of pain and disability while walking on a level surface, walking on an uneven surface, sleeping, standing, and walking different distances 33 . The FADI is frequently used during the assessment of subjects with chronic ankle instability and has demonstrated acceptable reliability and content validity as well as moderate responsiveness, so more recently it has been used to assess patients following total ankle replacement 22,32 .…”

“…The main limitation of the AOFAS hindfoot score is that both components are subjective and do not allow for any objective measure of function following total ankle replacement. The Short Form-36 (SF-36) also has been used to track changes in quality of life 21 , but it captures global changes and does not answer specific questions regarding the functional changes at the ankle; therefore, it may lack the responsiveness needed to detect changes following total ankle replacement 22 . In addition to self-assessment of outcomes as well as clinician assessment of outcomes, the use of clinically relevant functional tasks can aid in understanding how patient function has improved following total ankle replacement.…”

Coronal plane ankle alignment, gait, and end-stage ankle osteoarthritis

“…The TUG has high reliability and correlates well with other standard functional measures such as gait speed, self-report, and clinical report indices of function and is predictive of who can safely ambulate 17 . In addition, the TUG has been previously reported to be one of four factors that is important to assess in patients with end-stage ankle OA 18 .…”