[Improved use of laboratory diagnostic tests].

The effective use of laboratory results is less effected by improvement of the quality of analyses than by standardization and qualification of the pre-analysis as well as by improvement of the diagnostic value (interpretation). The predictive value of a laboratory result of constand sensitivity and specifity is established by the prevalence of the disease in the population group examined. By preceding general examinations (anamnesis, clinical examination) the prevalence and thus the predictive value is increased. Permanent exchange of information and experiences between physicians and laboratory scientists is an essential contribution to the improvement of medical care.