Gabriel Peixoto Leão Almeida1,2, Thamyla Rocha Albano3, Antônio Kayro Pereira Melo3. 1. Physical Therapy Department, School of Medicine, Federal University of Ceará, Alexandre Baraúna Street, 949 - 1° andar - Rodolfo Teófilo, Fortaleza, CE, 60430-160, Brazil. gabriel_alm@hotmail.com. 2. Knee Research Group, University of Ceará, Fortaleza, CE, Brazil. gabriel_alm@hotmail.com. 3. Knee Research Group, University of Ceará, Fortaleza, CE, Brazil.
Abstract
PURPOSE: To verify the validity and diagnostic accuracy of the hand-held dynamometer (HHD) with the isokinetic dynamometer for evaluating the quadriceps strength of subjects who have undergone ACL reconstruction (ACLR). METHODS: This validity and diagnostic accuracy study was conducted prospectively by examining 70 consecutive participants who had undergone ACLR at least 6 months previously. All participants performed strength evaluation of the quadriceps muscle using the HHD and isokinetic dynamometer. RESULTS: The HHD presented high test-retest reliability [intraclass correlation coefficient (ICC) = 0.98], moderate to good validity with the isokinetic dynamometer when compared for the quadriceps strength (r = 0.62), 100% perfect specificity [LR + infinity, 95% confidence interval (CI) 81.4%-100%] to identify those with LSI > 10%, and a sensitivity of 63.4% (48.9%-76.3%). CONCLUSION: The HHD is an instrument valid and reliable of low cost and easy handling compared to the isokinetic dynamometer to evaluate the quadriceps torque and the limb symmetry index after the ACLR with high diagnostic accuracy. LEVEL OF EVIDENCE: I.
PURPOSE: To verify the validity and diagnostic accuracy of the hand-held dynamometer (HHD) with the isokinetic dynamometer for evaluating the quadriceps strength of subjects who have undergone ACL reconstruction (ACLR). METHODS: This validity and diagnostic accuracy study was conducted prospectively by examining 70 consecutive participants who had undergone ACLR at least 6 months previously. All participants performed strength evaluation of the quadriceps muscle using the HHD and isokinetic dynamometer. RESULTS: The HHD presented high test-retest reliability [intraclass correlation coefficient (ICC) = 0.98], moderate to good validity with the isokinetic dynamometer when compared for the quadriceps strength (r = 0.62), 100% perfect specificity [LR + infinity, 95% confidence interval (CI) 81.4%-100%] to identify those with LSI > 10%, and a sensitivity of 63.4% (48.9%-76.3%). CONCLUSION: The HHD is an instrument valid and reliable of low cost and easy handling compared to the isokinetic dynamometer to evaluate the quadriceps torque and the limb symmetry index after the ACLR with high diagnostic accuracy. LEVEL OF EVIDENCE: I.
Entities:
Keywords:
Anterior cruciate ligament; Hand-held dynamometer; Knee; Muscle strength measurement; Quadriceps muscle; Return to sport
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