关键词: 婴幼儿, 胸围, 上臂围, 皮褶厚度

Abstract: Objective To understand the development pattern of skinfold thickness and its correlations with body weight,chest circumference and upper arm circumference of infants aged 0 to 12 months in Daxing district,Beijing,in order to provide reference for infants health care. Methods A total of 465 infants admitted to the child health care clinic were enrolled in this study from January 2017 to August 2018,and were divided into 5 groups by age.Their body weight,chest circumference,upper arm circumference and the thickness of the pleats at four parts were measured,including biceps brachii,triceps brachii,inferior angle of scapula and anterior superior iliac spine. Results The average body weight,upper arm circumference and the thickness of skinfolds at all age groups were significantly higher than those recommended by WHO in 2006 for children with the same sex and age.The increase of chest circumference in all age groups was greater than that of head circumference,the upper arm circumference increased rapidly within 0 to 12 months,and reached to the peak at 9 months.The development trend of skinfold thickness of male and female infants was consistent.The difference on skinfold thickness of triceps humerus between male and female infants aged 12 months was statistically significant (P<0.05),while the differences were not significant between different genders among other age groups (P＞0.05).The thickness of the pleats at the four parts had a significant effect on the weight and chest circumference of the male infants,of which the anterior superior iliac spine,triceps brachii and inferior angle of scapula had significant effects on the circumference of the male upper arm.The anterior superior iliac spine,triceps humerus and inferior angle of scapula had significant effects on the body weight and chest circumference of the female infants,and triceps humerus had a significant effect on the arm circumference of the female. Conclusions The average thickness of skinfolds in infants aged 0 to 12 months are higher than the reference index recommended by WHO.Chest circumference and upper arm circumference develop rapidly,among which the cross time of chest circumference and head circumference is significantly earlier.It is indicated that infants are likely to have good or excessive nutrition,positive exploration for the influencing factors is needed,thereby improving nutritional status in early life.

Key words: infant, chestcircumference, upperarmcircumference, skinfold