Development and assessment of a verbal response scale for the Patient-Specific Functional Scale (PSFS) in a low-literacy, non-western population

PurposeThe Patient-Specific Functional Scale (PSFS) is a routinely used measure of physical function with a 0–10 response scale. We aimed to develop verbal response options for the PSFS, pre-test it for use in a multilingual, low-literacy country— Nepal, and compare preference and error rates between numeric and verbal scale. We hypothesized that a verbal scale would be preferred by respondents and yield fewer errors.MethodWe interviewed 42 …