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目的了解不同海拔地区藏族青少年骨龄发育状况,为评价藏族青少年生长发育状况提供科学依据。方法分层整群抽取西藏不同海拔高度地区12所中小学的2 232名青少年,采用CHN骨龄测定法对不同海拔地区居住的青少年骨龄发育状况进行调查,比较不同海拔地区藏族青少年骨龄发育差异。结果绝大多数年龄组青少年骨龄低于日历年龄。高海拔地区和低海拔地区男女不同年龄组骨龄比较显示,部分年龄组差异有统计学意义(P值均<0.01);高海拔地区和低海拔地区男、女群体及总人群的骨龄比较显示,高海拔地区骨龄高于低海拔地区,差异均有统计学意义(P值均<0.01)。结论不同海拔地区藏族青少年骨龄发育有差异,较高海拔地区高于低海拔地区。
Objective To understand the bone age development of Tibetan adolescents at different altitudes and to provide a scientific basis for evaluating the growth and development of Tibetan adolescents. METHODS: A total of 2,232 adolescents from 12 primary and secondary schools in Tibet at different altitudes were stratified and clustered. CHN bone age determination was used to investigate the skeletal age development of adolescents living in different altitudes. The differences of skeletal age among Tibetan adolescents at different altitudes were compared. Results The bone age of adolescents in most age groups was lower than the calendar age. The comparison of bone age at different ages in high altitude and low altitude showed that there were significant differences in some age groups (P <0.01). The bone age of male and female groups and the total population at high altitude and low altitude showed that, The bone age at high altitude was higher than that at low altitude, the differences were statistically significant (P <0.01). Conclusion There are differences in bone age among Tibetan adolescents at different altitudes, which are higher than those at lower altitude in higher altitude areas.