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目的 应用婴儿 儿童 青春期 (ICP)生长模型研究儿童期开始年龄 (ACO)并探讨其对儿童时期生长的影响。方法 选择自出生纵向随访至 6岁的小儿共 16 2 3名。根据计算机绘制的每个小儿身长及其身长速率曲线对应ICP生长曲线图来判断ACO值。结果 男、女孩的平均ACO值分别为 11 2个月和 10 7个月。女孩显著早于男孩 (P <0 0 5 )。ACO值对儿童后期的生长有显著的作用 ,儿童期开始年龄延迟 1个月 ,到 5岁时其身高男孩降低 0 4cm、女孩降低 0 5 6cm。对ACO值的影响因素进行多元回归分析发现 ,性别、6月龄时身长和父母亲平均身高与ACO值均有显著关系 (P <0 0 5 )。对儿童期开始年龄和父母亲平均身高作线性相关分析发现 ,父母亲平均身高低于均数 2个标准差的男、女孩其儿童期开始年龄要比父母亲平均身高高于均数 2个标准差的男、女孩分别晚 1 5个月和 1 3个月。结论 应用ICP生长模型同样适合我国儿童体格生长的研究 ,儿童期开始年龄对儿童时期的生长起着重要作用
Objective To study the age of onset of childhood (ACO) in infants and young children (ICP) growth model and to explore its impact on childhood growth. METHODS: Totally 162 23 children aged 6 years were followed up from birth. ACO value was judged according to the ICP growth curve of each pediatric length and its body length rate curve drawn by the computer. Results The average ACO for boys and girls was 112 months and 107 months respectively. Girls were significantly older than boys (P <0 05). The ACO value has a significant effect on the later growth of children, the age of onset of childhood is delayed by 1 month, and by age 5, the height of boys is decreased by 0 4 cm and that of girls by 0 5 6 cm. Multivariate regression analysis of the influencing factors of ACO value found that gender, 6-month-old height and parental mean height had a significant relationship with ACO (P <0.05). A linear correlation analysis of the age at onset of childhood and the average height of parents found that both boys and girls, whose mean parental mean height was less than 2 standard deviations, had an onset age of 2 years or more Poor men and women were 15 months and 13 months later. Conclusion The application of ICP growth model is also suitable for the study of children’s physical growth in our country. The age at the beginning of childhood plays an important role in the growth of children