At baseline, questionnaires were used to obtain information on previous and present diseases, current medication and smoking history.
At baseline, questionnaires were used to collect data on tobacco smoking, education, physical activity, and menstrual and reproductive factors (i.e., age at first menstrual period, ever use of OCs, ever use of hormone replacement therapy (HRT)).
The baseline questionnaires are used as a starting point for tailoring the intervention so it is consistent with the written treatment guidelines.
Four questions in the baseline questionnaire were used for this purpose; two about job demands and two about job control.
For group 2 participants, the multiple imputation procedure in Stata/IC V.11.1 software with 50 imputations, through a multinomial logistic regression, was used to impute membership of the 7-year clusters identified for group 1. Information on clusters from the original study and outcome measures from the 7-year baseline questionnaire were used to impute cluster membership.
A pilot-tested and standardized baseline questionnaire was used.
The baseline questionnaire is used to measure different patient characteristics (age, gender, race, social status, Body Mass Index (BMI)), disease related characteristics (localisation of symptoms, duration of symptoms, family history) and co-morbidities.
At baseline, structured questionnaires were used to collect family history, current smoking status, and medical histories.
The baseline and follow-up questionnaires were used as outcome measures of this study.
At baseline, standardised self-report questionnaires were used to collect information.
At baseline, standardised self-report questionnaires were used to collect information on education, employment, ethnicity, lifestyle habits (smoking status and alcohol consumption), prescribed medication and health status (Euroqol 5 Dimensions [EQ-5D]).
