The purpose of the study was to provide a greater knowledge about human exposure to cigarette smoke constituents by evaluating selected biomarkers of exposure in smokers and non-smokers. This was an observational, parallel-group study to be conducted at multiple centres in the UK, Germany, and Switzerland. It was planned to enrol sufficient subjects such that at least 1440 subjects complete the study.
The current study was designed to determine the exposure of adult smokers and non-smokers to cigarette smoke constituents through evaluation of selected biomarkers of exposure.