A higher number of C-version questionnaires were returned than A-, B- or D-version questionnaires, though there was no significant association between assignment to questionnaire version in those sent the questionnaire and response (χ2 = 5.663, df = 3, p = 0.129).
Participants who agree to participate will be invited to a first baseline health check-up appointment, including collection of blood samples, completion of questionnaires, a health check-up, and finally random assignment to one of three groups.
Trained medical students, who were blinded to the assignment of the intervention, explained the questionnaire to students in the classroom.
Thousands of questionnaires were sent to managers across the country.
The team sent out three waves of questionnaires.
In particular, if your project includes the use of questionnaires, attach the questionnaires.
This Internet panel is managed by Flycatcher [ 22], a Dutch institute for online research liaised with Maastricht University which was in charge of the enrollment of participants, the randomization, the assignment of the interventions, and the distribution of the questionnaires.
Participants' questionnaires and blood specimens were linked through the assignment of a unique identifier code in the follow-up visits.
For more information about the assignment of items to scales a download for the English version of the questionnaire is available on http://www.copsoq.de/copsoq-english.
The main steps of the process were: choice of areas for analysis and questionnaire development, based on a review of scientific literature; assignment of scores and weights to individual questions and areas; implementation of a software interfaceable with Microsoft Office.
The questionnaires were completed individually, and the assessors were blinded to the assignment of the children.
