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本文采用南京市1444名健康儿童青少年(男4～22岁,女4～21岁)30项手、腕部骨化指标聚类划分不同的生长发育期。根据计算结果以分成四期较为合理。即: 1) 童年期:男4～10岁,女4～8岁。2) 青春发育初期:男11～14岁,女9～12岁。3) 青春发育中期:男15～17岁,女13～15岁。4) 青春发育后期:男18～22岁,女16～21岁。
In this paper, we use 30 hands of 1444 healthy children and adolescents (4-22 years old, 4-21 years old, aged 4-21 years old) in Nanjing city to classify the different growth stages by means of clustering the wrist ossification indexes. According to the calculation results to be divided into four more reasonable. Namely: 1) childhood: male 4 to 10 years old, female 4 to 8 years old. 2) early youth development: male 11 to 14 years old, female 9 to 12 years old. 3) mid-adolescence: male 15 to 17 years old, female 13 to 15 years old. 4) late puberty: male 18 to 22 years old, female 16 to 21 years old.