Test–retest reliability of the peak knee adduction moment during walking in patients with medial compartment knee osteoarthritis

Abstract

Objective. To estimate the test-retest reliability of the peak external knee adduction moment during walking in patients with medial compartment knee osteoarthritis (OA), and to describe the interpretation of the reported values. Methods. A total of 31 patients diagnosed with knee OA confined primarily to the medial compartment underwent quantitative gait analyses during 2 separate test sessions at least 24 hours apart and within 1 week. The peak knee adduction moment was calculated for each patient at each session based on the mean of 5 walking trials. Reliability was estimated using the intraclass correlation coefficient (ICC 2,1 ) and the standard error of measurement (SEM). Conclusion. The ICC suggests that the peak knee adduction moment is appropriate for use when distinguishing among patients, for example, in studies of various interventions intended to decrease dynamic load on the knee medial compartment. The SEM illustrates the importance of considering measurement error and incorporating confidence levels when interpreting an individual patient's peak knee adduction moment value.

Trunk lean gait modification and knee joint load in people with medial knee osteoarthritis: The effect of varying trunk lean angles

“…The variable of most interest is the external knee adduction moment (KAM), which acts to rotate the tibia in a varus direction. The external KAM is a reliable and valid indicator of medial knee load (11,12) and is most often quantified by evaluating the 2 peaks during stance, as well as the impulse (area under the KAM-time curve). The first and typically largest peak occurs during the load acceptance phase of gait (approximately 25% stance), and the second peak occurs during the propulsion phase (approximately 75% stance) (13)(14)(15).…”

Effect of Anterior Tibiofemoral Glides on Knee Extension during Gait in Patients with Decreased Range of Motion after Anterior Cruciate Ligament Reconstruction

“…26 Two participants actually exhibited less knee extension after the tibiofemoral glide. One of these participants was the oldest in the group, and the other had had the most recent surgery.…”

Prospective study on the effects of orthotic treatment for medial knee osteoarthritis in Chinese patients: clinical outcome and gait analysis

“…Previous studies have proven the validity of KAM for prediction of clinical and radiological osteoarthritis progression. 6 Orthotic treatment can alter loading to the knee in the hope of reducing symptoms and disease progression. Biomechanical studies have demonstrated a small effect size in reduction of KAM with a valgus knee brace [7][8][9][10] and lateral-wedged insoles.…”