Volume 38 Issue 8
Aug.  2017
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YAO Yajuan, ZHU Lin. Bone strength growth and development of students aged 7-16 in poor rural areas of northern Guangdong[J]. CHINESE JOURNAL OF SCHOOL HEALTH, 2017, 38(8): 1165-1167,1171. doi: 10.16835/j.cnki.1000-9817.2017.08.014
Citation: YAO Yajuan, ZHU Lin. Bone strength growth and development of students aged 7-16 in poor rural areas of northern Guangdong[J]. CHINESE JOURNAL OF SCHOOL HEALTH, 2017, 38(8): 1165-1167,1171. doi: 10.16835/j.cnki.1000-9817.2017.08.014

Bone strength growth and development of students aged 7-16 in poor rural areas of northern Guangdong

doi: 10.16835/j.cnki.1000-9817.2017.08.014
  • Publish Date: 2017-08-25
  • Objective To understand the bone growth and development of students aged 7-16 in poor rural area of northern Guangdong,and to provide a scientific basis for the prevention of osteoporosis.Methods Stratified cluster sampling method was used to select 951 students aged 7-16 in poor rural areas of northern Guangdong to perform a bone strength test by ultrasound.Resuits The speed of round(SOS) of male and female increased with age.Boys grew faster (3 784.25-3 891.21 m/s) during 14-16 years old,and the SOS:16 years old group> 15 years old group> 14 years old group> 13 years old group.The differences between the two groups were statistically significant(P<0.05).Girls grew rapidly during the 12-15 years old (3 730.81-3 908.21 m/s),.and the growth slowed up after the age of 15:15-year-old group> 14-year-old group> 13 years old group> 12-year-old group(P<0.05).During the 7-8 years old,boys' bone strength(SOS) was higher than that of female of the same age,SOS of the girls aged 13-15 was higher than that of male of the same age (P<0.05).The students had a very low level of bone strength,and the proportions of male and female bone with normal bone strength were 56.31% and 56.20%,respectively.The percentages of male and female with low bone strength were 11.99% and 9.50%,respectively.The highest percentage of abnormal bone strength could be found among the boys of 14 years old (29.20%),while the highest percentage of abnormal bone strength could be found among the girls of 13 years old(22.73%).There were no statistically significant differences in bone strength between different genders(P>0.05).Conclusion The bone strength of children and adolescents increased with age,and the developmental rate of bone mass is different in different age groups.The students in rural poor mountainous areas are genreally evaluated with lowbone mass,and are found with no gender differences.We should always pay attention to the development of bone strength among children and adolescents,especially in the 13-14-year-old students.
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