In recent years a number of commentators have discussed the importance of measuring quality of life in health care. We want to know whether an intervention will help people to live better, not just longer, and whether some treatments cause more trouble than they are worth. New technologies promise wondrous benefits. But when millions of people have no insured access to health care, and when many others face increasingly stringent limits on care, technologies’ high costs require us to choose what (...) we should do from the broader universe of what we can do.The challenges to measuring QL are formidable. Researchers debate whether to measure general QL or disease-specific QL; whether to focus on functional status such as the patient's ability to walk and dress himself, or on the value people ascribe to that functional status; whether to seek the values of the general public, or to concentrate on people actually affected by a given disease or disability. (shrink)