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A total of 250 students answered the questionnaires in this study.
A total of 55 migraineurs answered the questionnaires in this study.
Designing questionnaires in this manner can help minimize any potential discomfort and remind participants that they do not have to answer questions that cause any discomfort.
Regarding information bias, questionnaires in this study were administered at the time patients presented to the hospital, and prior to knowing whether they had acute hepatitis C or acute hepatitis A. Therefore, chances that the interviewer would be biased in recording exposure information for these two groups were minimised.
No validated questionnaires in this context were available.
A clear limitation may be the use of a self-report measure (questionnaires) in this study.
Similar(22)
Not surprisingly, the validity of the questionnaire used in this study raises similar questions to those experienced in Likert-scale close-question format questionnaires in general; this aspect therefore requires no further analysis here.
The questionnaire in this research consists of nine questions.
This shows the validity of the questionnaire in this study is fairly good.
First, although the questionnaire in this study was validated for migraine, it was not specifically validated for PM.
However, it is necessary to validate the VA questionnaire in this adult population.
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