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Skeletal maturity in Danish schoolchildren assessed by the TW2 method
Author(s) -
Helm Sven
Publication year - 1979
Publication title -
american journal of physical anthropology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.146
H-Index - 119
eISSN - 1096-8644
pISSN - 0002-9483
DOI - 10.1002/ajpa.1330510305
Subject(s) - danish , percentile , bone age , maturity (psychological) , demography , growth spurt , medicine , mathematics , psychology , statistics , developmental psychology , anatomy , philosophy , linguistics , sociology
Skeletal maturity was assessed from hand‐wrist radiographs in a sample of 3,817 Danish schoolchildren aged 7 to 18 years using the new version of the bone‐specific Tanner‐Whitehouse scoring system, the TW2 method. In most of the age groups in both sexes the distributions of the bone maturity scores displayed marked departures from normality; percentiles for the scores were therefore counted from the raw data. On the average, over the total age range, the differences between the age equivalents (bone ages) for the fiftieth percentile and chronological age were close to zero in both sexes, indicating good agreement with the British standards. However, in the individual age groups, and in particular at adolescence, characteristic divergences from the standards occurred, apparently reflecting the developmental spurt.