For the Barthel Index, both of these values are associated with a favorable outcome with different levels of sensitivity and specificity:
>95 (sensitivity 85.6%; specificity 91.7%)
>90 (sensitivity 90.7%; specificity 88.1%)
>75 (sensitivity 95.7%; specificity, 88.5%)
Mini-BESTest scores of less than 22 or 23 (depending on the study you look at) are associated with increased risk of falling in Parkinson’s disease. There is one study that found scores less than 17.5 were associated with a history of falling in the stroke population.