Petr Sedlak


Biological age determines the degree of biological maturity of a child’s organism. It characterises the complex state of an individual’s growth and development, and it represents an index that helps to define its morphological and functional traits. Biological age can be regarded generally as a process of physiological, biochemical, mental and anatomical ageing. It determines the state of a child’s development in respect to a definite age standard and classifies its position in the so-called ‘zones of growth velocity’ (acceleration, average development, retardation). 

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ACHESON R. M. (1966): “Maturation of the skeleton.” In: FALKNER F. (ED.). Human development. Philadelphia, Saunders.

BUCKLER J. M. H. (1990): A longitudinal study of adolescent growth. London, Springer.

BRAUER B. M. (1982): “Die Bestimmung des biologischen Alters in der Sport und jugendärtzlichen Praxis mit neuen anthropometrischen Methoden.” Ärztl. Jugend., 73, pp. 94–100.

GREULICH W. W., PyLE S. I. (1959): Radiographic atlas of skeletal development of the hand and wrist. 2nd ed., Stanford University Press, Stanford.

MARSHALL W. A., TANNER J. M. (1969): “Variations in the pattern of pubertal changes in girls.” Arch. Dis. Childhood, 44, pp. 291–303.

MARSHALL W. A., TANNER J. M. (1970): “Variations in the pattern of pubertal changes in girls.” Arch. Dis. Childhood, 45, pp. 13–23.

MARSHALL W. A. (1974): “Interrelationships of skeletal maturation, sexual development and somatic growth in man.” Annals of Human Biology, 1, pp. 29–40.

PYLE S. I., HOERR N. L. (1969): A radiographic standard of reference for the growing knee. 2nd edn., Springfield, Thomas.

RIEGEROVÁ J., SEDLAK P. (1996): “Methods for the diagnosis of biological age in children – biological proportional age.” Čs. Pediat., 51, 1, pp. 42–46 (in Czech).

SEDLAK P., RIEGEROVÁ J. (1998): “Biological proportional age – validity of index of somatic development (KEI).” Čs. Pediat., 53, 2, pp. 82–85 (in Czech).

SEDLAK P., RIEGEROVÁ J. (2002): “Evaluation of the biological proportional age in overweight children.” Čs. Pediat., 57, 4, pp. 151–154 (in Czech).

TANNER J. M. (1978): Foetus into Man. Harvard University Press, Cambridge.

TANNER J. M. ET AL. (1983): Assessment of skeletal maturity and prediction of adult height (TW 2 method). Academic Press, London.

TANNER J. M., HEALY, M. J., GOLDSTEIN H., CAMERON N. (2001): Assessment of skeletal maturity and prediction of adult height (TW 3 method). W. B. Saunders, London.

THIEMANN H., NITZ I. (1991): Röntgenatlas der normalen Hand im Kindesalter. Georg Thieme Verlag, Leipzig.

TODD T. W. (1937): Atlas of skeletal maturation. Part I. Hand. London, Kimpton.

ULIJASZEK S. J., JOHNSTON F. E., PREECE M. A. (EDS.) (2000): The Cambridge Encyclopedia of Human Growth and Development. Cambridge University Press, Cambridge.

WUTSCHERK H. (1974): “Die Bestimmung des biologischen Alters.” Theor. Und Praxis der Körperkultur, 23, pp. 169–170

ZACHMANN M., PRADER A., KIND H. P. ET AL. (1974): “Testicular volume during adolescence: Crosssectional and longitudinal studies.” Helv Paediatr. Acta, 29, p. 61


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