There is growing interest in the impact of patients' illness on the quality of life of family members. Much of the previous research focuses on the impact on family members who are also carers, or is restricted to one disease or disease area. This book describes the conceptualisation, development and validation of the first generic quality of life measure for family members, the Family Reported Outcome Measure (FROM-16). The book presents the findings of a literature review looking at current research into the area of family quality of life and highlights the need for a generic family measure. The process and results of interviews with 126 family members are discussed, and the development and validation processes of the measure are described in detail, including Item Response Theory and Classical Test Theory. Finally, this book details the potential uses of the FROM-16 and the challenges faced by clinicians, researchers and society in measuring family quality of life.