Electronic Thesis and Dissertation Repository


Master of Science




Dr. Trevor B. Birmingham


Quantifying the reliability and validity of gait data in patients with knee osteoarthritis is required to more confidently evaluate effects of interventions and identify potential responders. 109 patients after high tibial osteotomy underwent 3-dimensional gait analysis consisting of four walking trials to calculate the external knee moments in three anatomical planes. The first two trials were compared to the second two trials to evaluate within-session test re-test reliability. 61 patients were matched to 61 healthy controls of similar age, sex and body mass index. Intraclass correlation coefficients were very high, ranging from 0.93 for peak knee adduction moment to 0.84 for peak knee external rotation moment. Standard errors of measurement were more variable. The knee adduction and extension moments were significantly different between groups. These results suggest that knee moments are reliable and valid, but also illustrate the importance of considering measurement error when evaluating immediate changes in individuals.

Included in

Biomechanics Commons