In palliative care research, the challenge is to design studies that will capture changes in the domains of quality of life over time, yet will minimize participant burden and subsequent attrition rates. By measuring quality of life as an outcome variable in palliative care, health professionals can identify changes in the domains of quality of life over time for various patient populations and their family caregivers, and respond with appropriate interventions, which promote or maintain their quality of life even as death approaches.