[Methodological problems in the determination of biological age].

It is reported on a new method of the establishment of the biological age. The test battery designed comprises 12 parameters, from which a so-called biological index can be calculated which on its part serves as basis for the establishment of biological age. The realisability of the methods is demonstrated by examinations carried out on 340 healthy persons. The method developed for the geriatric practice is regarded as supplementation of the general medical examination and for the clarification of certain, above all gerontologically orientated questions.