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.