Similarly, there were 2 (0.6%) subjects at the ceiling for OA-FUNCTION-CAT functional difficulty compared with 10 (3%) for the WOMAC physical function scale.
This study of the OA-FUNCTION-CAT functional difficulty and functional pain item banks and CAT scales showed strong psychometric properties in this sample of persons with hip and/or knee OA.
Breadth of item coverage for the OA-FUNCTION-CAT functional difficulty and functional pain item banks and corresponding WOMAC scales is shown in Figure 2. Item coverage is displayed as the range of a person's scores that correspond to the highest and lowest values of expected item response categories in each scale.
For example, the highest item response category on the functional difficulty scale of the OA-FUNCTION-CAT was slightly over 80, whereas the WOMAC was limited to a little over 70 as its highest item response category expected score.
To make suitable comparisons between the WOMAC and the OA-FUNCTION-CATs and item banks, we first estimated calibrations for one instrument and then converted the other to the same scale, essentially calibrating the WOMAC items using the OA-FUNCTION-CAT item calibrations in the functional pain and functional difficulty domains as anchors.
Students who reported at least 1 functional difficulty due to a health condition were classified as having a disability.
Students who reported at least one functional difficulty due to a health condition were classified as having a disability.
In both countries, students with disabilities who had more than one functional difficulty were significantly more likely to report feeling low and nervous.
Functional difficulty may occur such as swallowing, maintaining the respiratory tract, and obstructive sleep apnea when vascular lesion involves deep tissue such as muscle and bone [8].
Using visual analog scales, its 24 items probe three dimensions pain (5 items), stiffness (2 items), and functional difficulty (17 items)—that are judged to be important by such patients.
"If you look at who is likely to be in that top 5percenttheyhavehave chronic conditions, which is what the medical system typically focuses on, but on top of that, they also have functional difficulty or dependence: it's hard to take a bath, it's hard to eat, it's hard to get dressed, it's hard to sleep in your own bed, so you're sleeping on the couch downstairs.
