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**all items analysed per SD increase.
Sensitivity and specificity were estimated for each of 85 items analysed using controls as the reference group.
Of the 51 EDAD items analysed, 29 were backcoded to specific d2-d7 domains of the ICF Checklist and, by rating the recorded difficulty to perform specific tasks with or without help, these were then taken as performance and capacity respectively.
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For those subscales with sufficient items, analyses supported unidimensionality.
The questionnaire consisted of 11 items analysing pain (5 items), maximum walking distance (2 items) and activities of daily living (4 items).
An initial pool of 34 items was subjected to reliability and item analyses with 282 participants.
The set of items was truncated with traditional item analyses, resulting in a reliable set of 21 items (α = .79).79
The bMCU test was developed in a stepwise procedure with qualitative methods complementing quantitative item analyses.
Table 2 shows the results of the classical and Rasch item analyses.
Item analyses including item facility (IF), item discrimination (ID), and Rasch estimates were computed to investigate how the items were working on the test-takers.
The item analyses, reliability, and factor analyses all indicate that these instruments are effective in assessing emergency physicians.
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Justyna Jupowicz-Kozak
CEO of Professional Science Editing for Scientists @ prosciediting.com