than 0.80) for use in patient care and clinical research with no difference in measurements for repeated tests, and that a positive, linear relationship between the two measures would be found.
Subjects were 43 ambulatory patients with chronic OA; most were women (71.7 percent), with a mean age of 65.6 years. Knee extensor strength was measured by HHD and MMT. Subjects were evaluated by an experienced physical therapist or assistant (student of physical therapy). MMT was performed before HHD. Each examiner's only experience with HHD was practice with the instrument with an instruction manual prior to testing. Descriptive statistics profiled subjects regarding age, chronicity, MMT grades, and HHD data. Intraclass correlation coefficient (ICC) calculated from repeated measures analysis of variance, determined HHD re
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