Intrarater reliability and agreement of a modified Closed Kinetic Chain Upper Extremity Stability Test

Objectives: To assess the reliability of a modified procedure for Closed Kinetic Chain Upper Extremity Stability Test (CKCUEST). Design: Intra- and intersession reliability and agreement; Setting: Clinical. Participants: Twenty-seven asymptomatic athletes. Main outcome measures: The modifications (m-CKCUEST) in CKCUEST procedure consisted in hand spacing at one half arm-span, and to complete the three regular-series of 15 s exertion by performing a fourth 1-min series during which the number of touches was counted every 15 s. The intra- and inter session reliability and agreement were assessed for the numbers of touches in order to produce two outcome measures: m-CKCUEST score and muscular endurance index. Results: The most reliable m-CKCUEST score was obtained when averaging the numbers of touches of the second and third sets (Intraclass Coefficient of Correlation(3,k); ICC = 0.92). Good reliability was found for muscular endurance index computed when dividing the one-half number of touches counted during the last 30 s of 1-min set, by the m-CKCUEST score calculated above (ICC = 0.86). Conclusions: The m-CKCUEST allowed the production of two reliable outcome measures, which assessed the upper limb stability and the muscular endurance. Such outcomes may be used in a follow-up to assess performance or rehabilitation level. (C) 2019 Elsevier Ltd. All rights reserved.