关键词: 体格发育, 儿童, 九市标准, WHO标准

Abstract: Objective To know about the physical growth and development of children aged 1 month to 7 years in Xi′an, in order to provide guidance for the growth and development. Methods Stratified cluster sampling method was adopted to investigate the physical growth and development of children aged 1 month to 7 years in Xi′an in 2015. The weight, height (length), head circumference and sitting height, chest circumference and waist circumference of children were collected. Totally 25 997 children were investigated and were classified into 21 age groups. Results The gap on the height increase among children aged 1 month to 3 years and the gap on the weight and chest circumference change among children aged 3 to 7 years were relatively large. There were differences on each index among urban, suburban and suburban counties groups between male and female at different age stages, mainly including body weight from 1 to 3 months, height above 15 months, head circumference from 1 to 5 months, chest circumference and waist circumference from 3 to 7 years old. The weight, height and sitting height of male and female in all age groups except 5.5-year-old girls were higher than the results of the nine cities survey, while head circumference, chest circumference and waist circumference were slightly lower than the results of the survey (P＜0.05). The weight for age Z score and height for age Z score were significantly higher than WHO standard, and Z value of children′s height and weight was 0.40-1.19. Conclusions Significant difference on physical growth and development of children aged 1 month to 7 years in Xi′an between suburban and urban areas still exists. Children′s physical growth and development is at a high level in the country and higher than the WHO standards.

Key words: growth and development, children, standard of nine cities in China, WHO standard