Some items were perceived as complex or difficult to understand due to unclear and ambiguous wording.
All items were perceived as relevant by the majority of respondents, and the coverage was perceived to be good.
First, the set of 20 items was reduced to one of 18 items because 2 items were perceived as redundant by the patients.
A focus on commonalities, rather than differences, ensures that all items are perceived similarly and use language appropriate for as wide a range of people as possible.
The inconsistent completeness of reporting among items may imply that certain items are perceived to be less important by researchers or journal editors, 19 although there is no evidence to justify such inference in the Korean context.
Although we have used these items and the corresponding response scales in prior studies and obtained respondent feedback, it would have been useful to conduct further pretesting including cognitive interviewing to better elucidate how the items are perceived.
Some items were perceived to be similar to each other, and some items contributed their respective scores to more than one user-need domain, problematic due to the inflation of inter-domain correlations that results.
The aim of this stage was to ensure that potentially ambiguous, impractical, or highly contentious incidents were excluded, and that the retained items were perceived as both dangerously harmful and relevant to a general practice setting.
Third, the tendency of health professionals to develop "home-made" questionnaires and their reluctance to use validated questionnaires developed elsewhere can be countered if questionnaire items are perceived as relevant.
User-friendliness of the three tools was evaluated by recording the time required to complete each tool and by inquiring the assessors of their perceived ease of understanding and following instructions, ease of understanding and completing items, and whether items were perceived as relevant.
