Both subsamples completed a postal survey

Two other samples were added to the study: first, new participants and secondly, a sample from the baseline investigation who still lived in Eindhoven in 2004.

The postal questionnaire provided information regarding socioeconomic position, SEP-related information, health, health behaviors, material factors, psychosocial factors, sociodemographics and the built environment.

Information from the survey has been linked to three main databases: the Cause-specific death registers from Statistics Netherlands; the National Medical Register including hospital admission information from all Dutch individuals; and the Regional Cancer Surveillance South.