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The Characteristics Of Changes In Bone Mineral Density And Bone Age Of 1557 Children And Adolescents Aged 7-16 Years In Chengdu Were Analyzed

Posted on:2020-12-25Degree:MasterType:Thesis
Country:ChinaCandidate:Z J ZhouFull Text:PDF
GTID:2437330572490393Subject:Human Movement Science
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Objective: To study the changes and distribution of the bone mineral density in the distal and distal part of the forearms of children from 7 to 16 years of age and to evaluate the bone mass of the children in the age of 7 to 16 years.At the same time,the relationship between bone maturity and bone mineral density was further analyzed in combination with the bone age index.And provides a reference for the selection of the evaluation index of the growth and development of the bone of the children and the young.Methods: From August 2017 to December,2018,the children of 7 ~ 16 school-age children of Sichuan Province were selected as the study object.According to the sex and age group,each year of age was a group,with a total of 10 age groups of 20 groups,and a total of 1557 people.Measure the subject's body High,weight and other morphological indicators.The forearm and calcaneus were measured by dual-energy X-ray bone mineral density tester.Bone age films were also taken and evaluated.The data of the experiment were analyzed by SPSS19.0 software.Results:(1)the calcaneal bone mineral density of children and adolescents was(0.361 ±0.11)g/cm2 higher than that of forearm bone mineral density(0.240 ±0.07)g / cm ~ 2;(2)the changes of forearm bone mineral density(BMD)with age were as follows: on the whole,the forearm BMD of male and female showed age-dependent changes.The upsurge in forearm BMD growth occurred about a year earlier in women than in men.Before the age of 13 years old,the bone mineral density of forearm in male was higher than that in female,but the trend of change was the same in male and female,and there was no statistical difference in forearm BMD between male and female at age 13.(3)The bone mineral density of calcaneus in male showed an aging change as a whole.From 11 to 15 years of age,15-year-old growth has slowed down after the change characteristics.Bone mineral density(BMD)of calcaneus increased continuously to 13 years old in female,and then slowed down after 13 years old.(4)Bone mass:the normal number of forearm bone mass was 853,accounting for 54.78%,the number of insufficient bone mass was 704,accounting for45.22%.Calcaneal bone mass:The number of normal persons was 1515,accounting for 97.3%,and the insufficient of bone mass was 42,accounting for 2.7%.(5)The results of the bone age and the life age,that the each age group have different advance to varying degrees,in which the bone age of the male group was greater than the maximum of the lifeage(1.0-1.3)years,and the minimum was(0.2-1.0)years;The maximum age of bone age in female group was greater than that of the age of life(1.0-01.0),and the minimum was greater than the age of life(0.2-1.4)years.(6)The different growth and development types were divided into three groups according to the difference between the age of bone and the age of life(at the age of 1.0).They were normal growth group(938 cases,60.24%),precocious maturity group(491 cases,31.54%)and late maturity group(128 cases,8.22%).The bone mineral density(BMD)of forearm in male and female precocious maturity group was higher than that in normal development group and late maturity group(P < 0.01),but there was no significant difference between normal growth group and late maturity group(P >0.05).The bone mineral density(BMD)of calcaneus was compared among the three groups: male precocious maturity group > normal growth group > late mature group(P < 0.01),female precocious maturity group > normal growth group and precocious maturity group(P < 0.05).There was significant difference in calcaneal bone mineral density between the three groups: precocious maturity group > normal growth group > late maturity group(P < 0.01).There was significant difference in precocious maturity group > normal growth group and precocious maturity group > late maturity group,but there was no difference in female between late maturity group and normal growth group.Conclusion:(1)the bone mineral density of calcaneus in children and adolescents is higher than that in forearm.It is suggested that calcaneus be selected as a local measurement site in monitoring individual bone mass.(2)the forearm of children and adolescents should be selected as a local measurement site.The calcaneal bone mineral density continued to increase with the increase of age,but there were gender and age differences in the growth rate.(3)the maturity of individual growth(bone age)coincided with the accumulation of bone mineral density(BMD),that is,the higher the bone maturity,the more bone mineral density(BMD)accumulated.
Keywords/Search Tags:Adolescent, Bone mineral density, Bone age, Growth and development, Physical health
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