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In the remaining questionnaires, item answers with missing values were recoded as 0 (zero).
Quality control of questionnaires, item scales and assessments involves the three components: validity, reliability and responsiveness, each having sub-concepts referring to specific contexts, types of studies and applications.
We then defined the patient's level of pain as the worst pain score reported in the baseline QoL questionnaires (item 9 of QLQ C30 and items 10, 11, 12 of QLQ LC13).
The subjects were instructed orally to read the questionnaires item by item, slowly and attentively, and not to return to previous items to check previous ratings, nor to modify them.
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Seven donors were excluded on the basis of missing values (30%% of the questionnaires items).
Answer categories differ per questionnaire item (see notes below the Table).
In the 200 responses to questionnaire item (2) for the MQs, there are 337 mentions to the reason of judgement.
The evaluators provided various comments on the questions in the experiment set in response to questionnaire item (5).
SF-8 questionnaire item.
Workforce status: The original questionnaire item included twelve response categories.
Instrument revision included changes to questionnaire item wording and format.
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Justyna Jupowicz-Kozak
CEO of Professional Science Editing for Scientists @ prosciediting.com