粤北农村贫困山区7~16岁学生骨强度发育状况

了解粤北农村贫困山区7~16岁学生骨强度发育状况,为儿童青少年骨质疏松的预防提供科学依据.方法 采用分层整群抽样方法,选取粤北农村贫困山区7~ 16岁的951名学生进行超声骨强度测试.结果 男、女生桡骨中段超声传播速度值(SOS)都随着年龄的增长而增加,男生在14~ 16岁期间增长速度较快(3 784.25~3 891.21 m/s),其中16岁组>15岁组>14岁组>13岁组,两组间比较差异均有统计学意义(P值均<0.05).女生SOS值在12~15岁期间增长速度较快(3 730.81~3908.21 m/s),15岁以后增长缓慢,其中15岁组>14岁组>13岁组>12岁组(P值均<0.05).男生在7~8岁期间,SOS值高于同年龄段的女生;在13~15岁期间,女生SOS值均高于同年龄段男生(P值均<0.05).学生整体骨强度水平较差,骨强度处于正常水平的男女生比例分别为56.31%和56.20%,不足的比例分别为11.99%和9.50%;男生14岁时骨强度异常构成比最高(29.20%),女生13岁时骨强度异常构成比最高(22.73%);不同性别骨强度评价构成比较差异无统计学意义(P>0.05).结论 儿童青少年骨强度随着年龄的增长而增加,不同年龄段骨量发育速度不同;农村贫困山区学生整体骨强度评价水平不高并且无性别差异,要时刻关注儿童青少年尤其是处于13~ 14岁学生骨强度的发育状况.

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

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.