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Initially nine items related to DHPB (Box A, Figure 1) were included in the analysis guided by the theory [ 12] of health behaviour (items 1, 4, 6, 7, 8 and 9 in Table 1, appendix 1) and new items developed as a consequence of focus groups conducted in Romania (items 2, 3 and 5).
Administration involves initially asking two items (loss of interest; feeling upset, distressed or depressed).
Content validity was insured by initially generating twenty-six items from interviews with nursing staff from inpatient Alzheimer units and then retaining eighteen items rated by independent nurses holding advanced nursing degrees as relevant with an operational definition of discomfort (the number of items was later reduced to nine).
Two items initially showed misfit to model expectations, Item 8 (I have felt sad or miserable) and Item 5 (I have felt scared or panicky for no very good reason) (see Table 1).
Using p < 0.20 as the cut-point for internal consistency, another two items were initially flagged, including item 3 (knowing an STI was present) and item 17 (partner disclosure).
After merging the scores of those two items which initially indicated DIF, all items fitted the Rasch model, the response scale thresholds were ordered, and no DIF was found.
We initially incorporated these items separately in the structural equation model but except for the path weights dividing almost equally between the two items, no difference was otherwise seen.
On day two, two items.
Two items are noted.
Initially, two cases were reported.
Those two items.
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Justyna Jupowicz-Kozak
CEO of Professional Science Editing for Scientists @ prosciediting.com