西双版纳傣族自治州傣族和汉族骨密度分布情况调查分析

Investigation on bone mineral density in healthy Dai and Han nationalities in XiShuangBanNa

目的研究云南西双版纳傣族和汉族正常人群骨量分布情况,确定峰值骨量,分析其年龄段变化规律。为本地区制定骨质疏松诊断标准提供科学依据。方法选择云南西双版纳傣族自治州健康傣族男女1126名,汉族健康男女1328名,年龄均为20～79岁。以10岁为一年龄段,对男女分别进行分组。用美国Alara公司提供的MetriscanTM指骨骨密度仪,对非习惯性用手的第2、3、4手指进行测量,取3个手指的平均骨密度值。数据采用SPSS11.0软件进行统计学分析。结果傣族和汉族男女峰值骨量都在30～39岁年龄段。骨量丢失12%以上傣族男女分别在60～69岁和50～59岁年龄段,汉族男女分别在70～79岁和60～69岁年龄段。骨量丢失25%以上傣族女性在60～69岁年龄段,汉族女性在70～79岁年龄段。傣族男女峰值骨密度分别为0.3378g/cm2和0.3349g/cm2。汉族男女峰值骨密度分别为0.3614g/cm2和0.3473g/cm2。傣族和汉族男性各年龄段骨密度均值比较差异有显著性,20～29岁年龄段P<0.05,30～79岁年龄段P<0.001。傣族和汉族女性30～79岁年龄段骨密度均值差异有显著性P<0.001。结论西双版纳傣族与汉族男性正常成人骨密度值差异有显著性;女性30岁年龄段以后差异有显著性。汉族男女骨密度均值高于傣族男女。傣族男女骨量丢失速率早于汉族男女。其差异是种族,还是饮食结构引起有待进一步研究。

Objective To conduct research on bone mineral density in healthy group in Dai and Han nationalities. To provide basic data for osteoporosis diagnostic criteria by defining the peak of bone mass and disclosing its change with age in XiShuangBanNa, YunNan province. Methods 1 126 healthy Dai and 1 328 Han people were selected aging from 20 to 79, whose middle part of2nd, 3rd and 4th fingers of less frequently used hand were measured by MetriScanTM from Alara company to obtain the mean value. SPSS 11.0 was applied in data analysis. Results For both Dai and Han nationalities, the bone mass peaks at the age of 30 to 39. Over 12% bone loss is observed for Dai male and female at their 7th and 6th decade respectively, while for Han male and female, similar loss appears in the 8th and 7th decade. Female Dai people lose more than 25% bone mass in their 7th decade and it is happened for female Han people in their 8th decade. The peaks of bone mass for male and female Dai people is 0.3378 g/cm^2 and 0.3349 g/cm^2 , for male and female Han people 0.3614 g/cm^2 and 0.3473 g/cm^2 respectively. Significant difference can be observed between two nationalities for males at each age stage and after 30 years old for females. Conclusion There is significant difference between two nationalities for males and for females after 30 years old. Han people have a higher bone mass density than Dai, and Dai people lose their bone mass about 10 years earlier than Han people. Whether the difference is caused by ethical or diet factors is to be studied.