目的调查成都地区城乡人群腰椎、髋部骨密度（ BMD）和原发性骨质疏松症（ OP）的患病率及影响因素。方法用整群随机抽样≥ 20岁人群共 1 460人，采用 DEXA测量 L 2～ 4和股骨近段 BMD值，按城乡、男女分别每 10岁一个年龄组进行统计分析。结果骨量峰值（ PBM）在 20～ 39岁，男性 L2～ 4为 (1.120± 0.118)g/cm2，女性为 (1.113± 0.111)g/cm2。随年龄增加， 40岁后各类人群 BMD逐渐下降，女性明显大于男性（P<0.01）。结论年龄、性别和居住区是影响BMD的重要因素。%Objective To investigate the morbidity of osteoporosis and factors affecting lumbar spine and bone mineral density(BMD).Method Dual energy X－ ray absorption－ metry was used to measure the bone mineral density(BMD)of the lumber spine and proximal femur in 1 460 normal persons in Chengdu district(aged 20 and over,662 in the city and 798 in the countryside).Result This cross－ section study showed that the peak bone mass(PBM),either male or female,occurred in age group of 20～ 39 years old.The value of BMD in male was (1.120± 0.118)g/cm2,1.113± 0.111g/cm2 in female.Bone loss began at 40 years old.Bone loss began at 40 years old .Bone loss rate in female was faster than that in male at all sites(P<0.01).Conclusion For prevention of OP,it is worthy of enhancing PBMby proper diet and exercise during the supplement of calcium and estrogen are very important for the rural women especialy for the postmenstural women.
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