Both relative reliability, using the intra-class correlation coefficient (ICC), and absolute reliability, using standard error of measurement (SEM) and minimal detectable change (MDC 95) values, were calculated Bland–Altman plots were constructed to evaluate inter-tester agreement. Method : A sample of 15 adults (mean age 80.20 years) with AD performed three balance tests: the BBS, timed up-and-go test (TUG), and Functional Reach Test (FRT). Purpose: To measure test–retest and interrater reliability of the Berg Balance Scale (BBS) in community-dwelling adults with mild to moderate Alzheimer disease (AD).
