Abstract
Context:Measurement reliability is critical when new sports-medicine devices or techniques are developed.Objective:To determine the reliability of laxity measurements obtained from an instrumented ankle arthrometer.Design:Intratester reliability was examined using a test–retest design, and intertester reliability was assessed using the measurements recorded by 2 different examiners on a separate group of participants.Setting:Sports-medicine research laboratory.Participants:40 participants with no history of ankle injury, equally divided across the 2 studies.Measurements:Laxity measurements included anteroposterior (AP) displacement during loading to 125 N. Inversion–eversion (I–E) rotation was tested during loading to 4000 N-mm. The measures were analyzed using intraclass correlation coefficients (ICCs) and dependentttests.Results:Good to excellent ICCs (.80–.99) for intratester and intertester reliability. A significant difference in measures was observed between testers for both AP displacement and I–E rotation.Conclusions:Laxity measurements from an instrumented ankle arthrometer are reliable across test days and examiners
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