A Disease based Comparison of Health Systems : What is Best and at what Cost What approach to treating certain ageing related diseases works best and at what cost That is what combination of health care system characteristics prevention detection technology and treatment is the most cost effective The OECD Ageing Related Diseases study investigated how health systems treat three diseases: ischemic heart disease stroke and breast cancer. This book includes papers discussing the results of the OECD study with essays by leading experts and uses a disease based approach to comparing health systems.