Risk profiling and screening for colorectal cancer

The studies included in this thesis address a number of topics concerning risk stratification and differentiation in health care. As health care costs are increasing and the urge for prevention is rising, differentiating in the provision of health care may be one of the options for sustaining the health care system that we have now. Differentiation based on risks and needs can increase health care efficiency, by offering care to those individuals who need it most. The studies reported in this thesis evaluated differentiation in a number of ways: its use in colorectal cancer screening, regarding the use of aspirin for primary prevention, and with respect to the acceptability of differentiation in premiums and waiting times based on health behaviour.