Zusammenfassung

Purpose: Evaluate intra- and interrater reliability for the platform Good Balance Metitur (GBM) through a test-retest trial. Material: Healthy subjects (N=34) with mean age 36 years, and had no problem with balance, sensibility, or low back pain. Method: The measurements were performed of two trained physiotherapists. Time between test-retest was one week (intrarater test), and ten minutes between the two testers (interrater test). Outcome measures were Intraclass Correlation Coefficient (ICC), Standard Deviation within Subjects (Sw) and Smallest Detectable Difference (SDD). Results: ICC showed moderate to low degree of intrertester reliability (0.4 0.8), lowest for one leg standing eyes closed, highest for one leg standing test dominant leg, eyes open on intrarater test. Sw was moderate to high for all the tests (0.84 mm/s to 1890 mm), and SDD ranged from 1.65mm/s for speed in x-direction sitting test eyes open, to 3706 mm in marked distance in dynamic two leg standing test. Conclusion: GBM showed moderate to good test-retest relative reliability (ICC> 0.67) in one leg dominant standing for healthy subjects, highest for intrarater test. The reliability was low for the other tests. We can therefore only recommend GBM as an measurement tool for postural control in healthy subjects. We also have to test it further before using it in patients.