南宁地区成年女性骨密度与年龄、体重指数关系的研究

Relationship between bone mineral density,age and body mass index in adult females in Nanning

目的研究南宁地区成年女性骨密度（BMD）与年龄、体重指数（BMI）之间关系。方法采用双能X线骨密度仪测量384例年龄20～87岁的女性腰椎正位和股骨近端的BMD;分别按年龄和BMI分组,分析各年龄组和各BMI组BMD和骨质疏松（OP）检出率的变化。结果①腰椎和股骨近端骨峰值均出现在30～39岁组;50岁后BMD明显降低,70岁后再次出现BMD降低加速。②OP在50岁后明显增加,并以每增加10岁OP增加20%以上的速度发展,80岁后OP发生率近100%。③与正常BMI和超BMI组相比,低BMI组BMD显著降低,OP显著增高。结论南宁地区成年女性BMD峰值在30～39岁;绝经后、年龄70岁以上和低BMI是OP发生危险因素。

Objective To investigate the relationship between bone mineral density （BMD）,Age And body mass index （BMI）in adult females in Nanning. Methods 84 females aged between 20 and 87 years are divided into different age and BMI groups. Bone mineral density （BMD）of anterior-posterior lumbar spines and proximal femur is detected by dual-energy X-ray absorptiometry （DEXA）. BMD and osteoporosis （OP） incidence in all groups are analyzed. Results BMD peak appears in the group of age 30～39,BMD significantly decreases after age 50,the decrease of BMD accelerates after age 70. OP incidence increases by 20% every 10 years after age 50. OP incidence is nearly 100% after age 80. In low BMI group the BMD is significantly lower than normal BMI and high BMI groups whereas OP is significantly higher. Conclusion BMD peak appears at the age of 30 to 39 in adult females in Nanning. Post menopause,age over 70 and low BMI are the risk factors of OP.