Calibrating limitation features and dependence levels in basic activities of daily living among individuals with dementia: an item response theory-based analysis.

As expected, these measures showed an increasing trend in line with the ascending scores for the categories: from “no limitations” (-3.6 to -1.8), to “initiation deficits” (-2.7 to -0.6), “planning deficits” (-2.2 to 0), “organizational deficits” (-1.6 to 0.4), “partial execution deficits” (-1.2 to 0.8), “inability with cooperation” (0.3 to 1.3), and finally to “complete inability” (1.4 to 2.1), indicating a satisfactory category ordering for all categories except UR (resistance to care) (0.8 to 1.9).

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