A retrospective cross-sectional study using the baseline questionnaire of the Millennium Cohort Study.
This study was a cross-sectional survey using the baseline questionnaire (9 months postnatally) of the Millennium Cohort Study.
After making sure that the patient has signed the consent form, a research assistant (RA) will use this meeting to assess a patient's SBP and DBP, height, weight, and BMI, using standardized techniques (see below), and to obtain self-reporting measures using the baseline questionnaire.
Finally, from the WOEAS homes for which information on a wide range of housing characteristics and time-activity patterns was collected twice, we used the baseline questionnaire.
Firstly, since we only used the baseline questionnaire in the analyses, and the time to return to work was monitored by the insurance company, loss to follow-up was not applicable in the current study.
Since no relevant differences were found between the RCT and the cohort, and since we only used the baseline questionnaire to identify prognostic factors before the actual treatment was started, we decided not to include willingness to participate as a possible prognostic factor, but to adjust the analyses for this factor.
Men were categorised by quintiles (or categories) of dietary intakes using the baseline food use questionnaire.
The scales used in the baseline questionnaires were adapted from a paper by Ystgaard and collegues from 1999 [ 41].
The data on the reproductive history were collected using the baseline FMMP reproductive history questionnaire, the annual reproductive history updates, and the menstrual history questionnaire administered in 2007 2008.
Internal consistency was evaluated by Cronbach's alpha coefficient using the baseline scores of all questionnaire items.
