In addition, the questionnaire includes socio-demographics survey items (age, gender, education, professional activity, living arrangement) and a survey for participant feed-back to the questionnaire.
The HRA-O questionnaire contained the items listed in Table 1 plus, at the end, a brief survey on participant feed-back to the questionnaire.
Discrepancies will be resolved by referring back to the original questionnaires.
Data were then cleaned by referring back to the original questionnaires.
For any errors, this was checked back to the hard copy questionnaires and corrected where data was available or incorrectly entered.
Several migraine screening tools have been tested, including two seminal questionnaires dating back to the 1990s [49, 50], the Migraine Screen Questionnaire (MS-Q) [51], the deCODE Migraine Questionnaire (DMQ3) [52], a German questionnaire [53], and the Structured Migraine Interview (SMI) [54].
But because the patients had to send the questionnaire back to the GP, they probably responded as they would have during a consultation with him or her.
For those who did not mail the questionnaire back to the Study Centre, up to three postal reminders were sent in the following weeks.
During the next few years, he plans to study the stories — some two hundred so far — by going back to the authors with a questionnaire.
Participants completed the screening instruments at home at a time convenient to them and mailed the questionnaires back to the researchers using a reply paid envelope.
