["Questionnaire on Quality of Life in Asthma"--studies of the dimensionality and references for evaluation].

The FLA, representing the German revision of the LWAQ (Hyland et al., 1991), is one of the few available questionnaires for measuring the disease-specific quality of life (QOL) in adults suffering from asthma. The present study aimes at analysing the structure and reliability of the FLA and also at improving its feasibility.