Hi,
Qualified patients completed a self-administered questionnaire that included several sections: demographics and disease severity; the WPAI:IBS; the Work Limitations Questionnaire (WLQ);[debriefing and Dimensions of Daily Activities (DDAI); and a retrospective diary. In order to test the effect of the detailed questions about work productivity in the WLQ on the single-item work productivity question in the WPAI:IBS, patients were randomly assigned to one of two groups, with different order of administration of the questionnaire, as follows :
Group A: Demographics/symptom severity and WPAI:IBS; debriefing/DDAI: WLQ, diary.
Group B: Demographics/symptom severity and WLQ; WPAI:IBS; debriefing/DDAI; diary.
Regards.