Heads of household completed an additional questionnaire regarding household characteristics.
An additional questionnaire regarding health-related quality of life, the Short Form Health Survey (SF-36) (31), was included in 2003.
In order to assess the feasibility and acceptability of computer-based questionnaires, the participants filled in an additional questionnaire regarding level of education, previous computer experience, and method preferences.
Identified suspects completed an additional questionnaire regarding their social-economic situation, smoking status, and the presence of TB related symptoms in the preceding six months (cough, fever, weight loss, chest pain and haemoptysis).
Two additional questionnaires, one regarding the quality of life (QoL) and one regarding alcohol consumption habits, will be filled out once during the IIGI.
Subjects then completed additional questionnaires (see below).
After lunch, students completed questionnaires regarding their lunchtime beverage consumption.
For this study, an additional question was included in the questionnaire regarding the occurrence of rodents in the stables (none, few, many, not known).
Field workers administered a comprehensive health questionnaire regarding health history, behaviors, and sociodemographic information (Additional file 1).
The envelope contained a self-administered questionnaire regarding the time spent on ten different sedentary activities (Additional file 1).
