体质指数对女性胫骨超声传导速度的影响

目的研究体质指数(BMI)对骨峰值期和绝经后女性的胫骨超声传导速度(SOS)的影响。方法采用骨定量超声仪测量399例骨峰值期和589例绝经后女性的胫骨SOS值,并按BMI不同各分为低体重组、正常体重组和肥胖组进行分析。结果骨峰值期,女性BMI与胫骨SOS无相关性(r=0.054,P=0.287),低体重组、正常体重组和肥胖组的胫骨SOS差异无显著性(F=0.2,P=0.801);绝经后,女性BMI与胫骨SOS呈正相关(r=0.115,P=0.006),肥胖组的胫骨SOS高于低体重组和正常体重组(F=4.2,P=0.016),且肥胖组和正常体重组骨质疏松症的患病率均低于低体重组(P<0.001)。结论女性骨峰值期,BMI对胫骨的强度影响小;绝经后,BMI大者能延缓胫骨的强度下降。

EFFECTS OF BODY MASS INDEX ON SPEED OF SOUND OF THE TIBIA IN WOMEN

Objective:To investigate the effects of body mass index(BMI)on speed of sound(SOS)of the tibia in young and postmenopausal women.Methods:SOS were measured by bone quantitative ultrasound(QUS)apparatus in399young and589postmenopausal women,who were devided into three groups(low body weight ,normal weight and overweight )according to their BMI.Result:There was no significant difference in SOS among three groups(F=0.2,P=0.801)and no significant correlation between BMI and SOS in young women(r=0.054,P=0.287).Signifi-cant positive correlation was found between BMI and SOS in postmenopausal women(r=0.115,P=0.006),and the SOS of overweight group was significantly higher than that of the low body weight group and normal weight group(F=4.2,P=0.016).The incidence of osteoporosis in overweight group and normal weight group was signifi-cantly lower than in low body weight group (P<0.001).Conclusion:BMI has no significant effect on tibia strength in young women,but higher BMI can reduce the rate of loss of the tibia strength in postmenopausal women.