Objective To assist the estimations of body proportions by measuring the physical symmetry indexes of 6~13 years old healthy children in Shenzhen. Methods Four primary schools were chosen by random cluster sampling method.The children were divided into 7 age groups of each gender.Measurements of height,weight,sitting height,arm span were carried out by endocrinologists.The ratio of sitting height /height,arm span /height and Extremities-trunk were calculated. Results 1) Totally 3 212 children underwent body measurements,451 were excluded,2 761 were included.There were 1 400 boys and 1 361 girls included,including 2 670 ethnic Han that accounted for 96.7%.There were 91 children from 18 minorities.The number of each age group were ranged from 67 to 333.2) As the age growing from 6 to 13,the ratio of arm span/height and extremities-trunk of boys were increased from (0.97±0.02)cm and (2.56±0.11)cm to (0.97±0.02)cm and (2.80±0.11)cm respectively.Those of girls were increased from (0.96±0.02)cm and (2.57±0.09)cm to (0.96±0.02)cm and (2.57±0.10)cm respectively.The ratio of sitting height/height was decreased from (0.55±0.01)cm to (0.52±0.01)cm.3)The mean proportion of sitting height/height was significantly lower in boys compared with girls at the age of 12~13 years old (P＜0.01);The mean proportion of extremities-trunk ratio was significantly higher in boys compared with girls at the age of 11~12 years old and 12~13 years old(P＜0.01);the mean proportion of arm span/height was significantly higher in boys compared with girls at the age of 7~10 years old (P＜0.05). Conclusion The results of this study can help with the judgments of body proportions of healthy children in Shenzhen aged of 6~13 years old.
Key words
arm span /
sitting height /
body proportions /
child
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