Evaluation of evidence-based patient information on colorectal cancer screening

Study hypothesis: Evidence-based patient information leads to more informed choices in colorectal cancer screening than traditional information. Primary outcome(s): Informed choice, consisting of the following three dimensions: 1. Knowledge 2. Uptake of colorectal cancer screening 3. Attitude towards colorectal cancer screening Informed choice is measured using the validated questionnaire "Measure of Informed Choice" 6 weeks after the intervention has been provided. Added as of 05/03/2009: Data analyses of knowledge, attitude and uptake questionnaires will be performed according to a predefined coding guide, which has been deposited at a staff member not involved in the study. Data entry and analyses will be carried out blinded.