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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.
Moreover, the weighting from community survey by the AHP questionnaire in this study ranked global warming potential and air pollution in the top three most concerning environmental issues in India.
The EQ-5D is the only identified questionnaire in this study that measures the quality of life in a cardinal index value and thus meets the requirements of cost-utility analyzes.
Thirdly, though the questionnaire in this study was intended to be as comprehensible as possible, some dimensions of test takers' attitude were not included in our investigation (e.g., test anxiety, see also Zhao & Cheng, [2010]).
The questionnaire in this study contained questions similar to those in past publications, but also incorporated further sections that addressed the aims being considered in this article, as well as other aims that will be discussed in subsequent publications.
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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.
The questionnaires in this study also included items on domestic violence from the HARK questionnaire [ 35].
In view of this, we had to give up on the Tamil questionnaires in this study.
We included the EORTC QLQ-C30 in the set of questionnaires in this study.
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