Measuring quality of life - Is quality of life determined by expectations or experience?

Health related quality of life is the gap between our expectations of healt h and our experience of it Perception of quality of life varies between individuals and is dynamic wit hin them People with different expectations will report that they have a different q uality of life even when they have the same clinical condition People whose health has changed may report the same level of quality of lif e when measures are repeated Current measures do not take account of expectations and cannot distinguish between changes in the experience of disease and changes in expectations o f health.