Written instructions, response sheets, debriefing forms and a script of the structured interview are provided as supplementary information (see Supplement S1).
The format, instructions, response scale, and scoring method are identical to the PedsQL™ Brain Tumor Module.
Of note, the question wording and instructions, response categories, formatting, question order, and response categories of the interviewer-administered CCHS were preserved.
Two authors then evaluated the instructions, response categories, and wordings of items using the QAS-99 Question Appraisal System [ 42] leading to some minor adjustments.
Any participants who rated the instructions, response format or any item of the LATCon II as unclear were asked to provide suggestions on the modification.
The clarity of the OHIP-14 K was rated for relevance and equivalence both for the entire scale (S-CVI) and individually for the instructions, response format, event frequency, and items (I-CVI).
The pre-final version of the instrument was pilot tested among Chinese hypertensive patients to evaluate the instructions, response format and the items of the LATCon II for clarity.
Importantly, the elements of interest in a content validation study are not just the content or items of the measure, but all elements of the instrument including the instructions, response format, and scoring procedures [ 53].
The purpose of the present study was to examine the content validity of the IDUQOL using judgmental methods based on subject matter experts' (SMEs) ratings of the IDUQOL title, items, instructions, response format, scoring procedures, and record form.
Demographic details for the bilingual and lay panels are shown in Table 1.The bilingual panels in each country were able to translate all instructions, response options and items without any serious difficulties.
