Epidemiological Investigation Of Sebum Thickness In Children Aged 6-15 Years Old In Baota District Of Yan’an City

Objective:1.To understand the present situation of the development of sebum thickness of children aged 6-15 years old in Baota District of Yan’an City.The method of measuring overweight and obesity by Body fat percentage was used to understand the epidemic situation and influencing factors of overweight and obesity among children in Baota District of Yan’an City.So as to provide a basis for studying their growth and development and formulating prevention and treatment measures for overweight and obesity.2.The consistency of body fat percentage(BFP)and body mass index(BMI),as an index for judging obesity.Methods:This study adopts the method of multi-stage cluster sampling,according to the five directions of east,south,west,north and middle,a total of students from Liulin Primary School,Beiguan Primary School,New District Primary School,Liqu Primary School and Yan’an University affiliated Middle School were selected from urban and rural areas for physical measurement and questionnaire distribution and collection.SPSS.22.0.is used for data processing,the measurement data were expressed by"?x±s",the independent sample t test and Mann-Whitney U test were used for comparison between groups,the counting data were analyzed byχ2 test,and the correlation test was conducted by Spearman rank correlation and multivariate Logistic regression analysis.Results:1.A total of 6687 children participated in the survey,including 3541 boys(52.95%)and 3146 girls(47.05%).2.The abdominal sebum thickness of boys and girls increased gradually with age before puberty.After puberty,boys tended to slow down after 12 years old,while girls began to increase rapidly at 12 years old,and then decreased slowly.The comparison of the two results showed that there were significant differences in all age groups except 6,7,8,10 and 12 years old groups(P<0.05).The sebum thickness of triceps brachii muscle increased gently in boys at the age of 6-15,while that of girls was almost the same as that of boys at the age of 6-10,increased rapidly at the age of 11-13,and decreased after 13 years old.There were significant differences in other age groups except 6,8 and 12 years old groups(P<0.05).The subscapular sebum thickness of boys increased at 6-10 years old,remained stable at 10-14 years old,increased rapidly after 14years old,while girls increased steadily at 6-12 years old,increased rapidly at 13 years old,and then decreased gradually.Results there were significant differences in the age groups of 9,11,13 and 14 years old(P<0.05).The body fat percentage of girls increased with age from 6 to 10 years old,decreased slightly at 11 years old,then increased rapidly,and decreased after 13 years old,while that of boys decreased year by year after the peak at 10 years old.There was no cross phenomenon in the changing trend of body fat percentage between different genders,and the body fat percentage of girls in the same age group was higher than that of boys,and there was a very significant difference between boys and girls in different age groups(P<0.01).3.The detection rates of overweight and obesity in 6687 children of different genders from 6 to 15 years old in Baota District of Yan’an City were compared according to the standard of Body fat percentage.The correlation coefficient of Spearman was used to express the correlation between BMI and body fat percentage of boys and girls.The results showed that there was a high correlation between body fat percentage and BMI(male r_s=0.808,P<0.0001;female r_s=0.755,P<0.0001).4.Analysis of related factors:birth weight,mode of delivery,preference for sugary drinks,eating speed,time of falling asleep at night,frequency of snoring during sleep,preference for staple food,annual family income,father’s BMI and mother’s BMI were independent influencing factors of overweight and obesity.The protective factors of overweight and obesity were as follows:the speed of eating every meal was more than 20minutes,the staple food of each meal was pasta,and the parents were the main caregivers.The heavier the child’s birth weight,the cesarean section at birth,the higher the frequency of snoring during sleep,the father’s BMI≥24 and the mother’s BMI≥24 were the risk factors of overweight and obesity.Conclusion:1.The body fat percentage and sebum thickness of boys and girls in different age groups increased with age,and decreased gradually after 13 years old,and there was a very significant difference in body fat percentage between boys and girls in different age groups(P<0.01).The body fat rate of girls is higher than that of boys.2.In Baota District of Yan’an City,the detection rates of overweight and obesity in boys were higher than those in girls;the detection rates of overweight in 14-year-old and13-year-old were the highest.3.There is a high consistency between body fat rate and body mass index in the judgment of overweight and obesity.4.Overweight and obesity of children aged 6-15 years old in Baota District of Yan’an City are related to life style.The protective factors of overweight and obesity were as follows:the speed of eating every meal was more than 20 minutes,the staple food was pasta,and the parents were the main caregivers.The heavier the child’s birth weight,cesarean section,sugary drinks,the higher the frequency of snoring during sleep,the father’s BMI≥24 and the mother’s BMI≥24 were the risk factors of overweight and obesity.