Measuring the quality of life: a comparison between physically and mentally chronically ill patients and healthy persons.

The FLZ seems to be a suitable method for reliably measuring the quality of life of healthy persons and of patients, as well as differentiating between persons and groups. The concept of weighting satisfaction with the individual importance of each of the items and of measuring several dimensions seems to make sense in view of the data. The modified version of the FLZ is currently being employed in various hospitals. The assessment of a larger normative sample is being planned. QL shall then be differentiated from the construct mood and be compared to objective data. In addition, the sensibility to change of the questionnaire shall be tested in a process analysis.