绝经后女性血清睾酮与瘦体质量、体脂和骨密度的关系

目的:探讨绝经后女性人群血清睾酮与瘦体质量、体脂和骨密度的关系。方法:长沙地区各工作岗位的45~81岁绝经1年以上健康女性志愿者185例,每例受试者空腹抽血,放射免疫法测定血清睾酮浓度。采用美国Hologic QDR-4500A型扇形束DXA仪,测量每例受试者腰椎前后位腰1至腰4及髋部总体面积骨密度(BMD), 单位g/cm2。用美国Hologic QDR-4500A型扇形束DXA仪作全身扫描测出头部、躯干、肋骨、骨盆、脊椎、上肢、下肢及全身的骨矿物含量、BMD、体脂含量和肌肉组织质量,结合测得的指标,计算出体质量、瘦体质量和体脂百分比。所有资料均输入电脑,应用SPSS11.0软件包进行统计学分析。结果:血清睾酮含量与瘦体质量、总体脂及体脂百分比均不相关；血清睾酮含量与腰椎、髋部BMD正相关,校正年龄、绝经年限、体脂和瘦体质量后,相关性消失。瘦体质量与各个部位BMD呈显著正相关;总体脂含量与髋部BMD呈正相关,体脂百分比与全身BMD呈负相关。结论:保持一定量的瘦体质量有利于绝经后女性保持骨量,而补充雄激素尚需谨慎。

Association of serum testosterone with lean body mass, body fat content, and bone mineral density in postmenopausal females

Objective To determine the relationship between serum testosterone level and lean body mass, body fat content, and bone mineral density (BMD) . Methods The study involved 185 healthy females in Changsha, aged 45 ～81. Fasting serum testosterone was measured by radioimmu-noassay. Hologic QDR 4500A fan beam X-ray bone densitometer was used to measure the BMD of anteroposterior lumber (AP, L_(1～4)) and total hip, to measure the bone mineral content, BMD, body fat content and muscle tissue weight of head, trunk, ribs, pelvis, spine, upper limbs, lower limbs and the total body. Body weight, lean body mass and body fat percentage were calculated. SPSS 11.0 software was used to conduct regression analysis. Results (1) Serum testosterone showed no correlation with lean body mass, body fat content, and body fat percentage. (2) Serum testosterone was positively related with the BMD of lumbar spine and hip, but showed no correlation with the BMD after adjustment of age and years since postmenopause. (3) Lean body mass showed significant positive correlation with the BMD of different sites. Total body fat content showed positive correlation with the BMD of total hip, while body fat percentage showed negative correlation with the BMD of the whole body. Conclusion Keeping lean body mass benefits postmenopausal women to maintain bone mineral content, and taking androgen should still be cautious.