Relationship between body composition and bone mineral content in young and elderly women

被引:31
作者
Bedogni, G
Mussi, C
Malavolti, M
Borghi, A
Poli, M
Battistini, N
Salvioli, G
机构
[1] Univ Modena & Reggio Emilia, Fac Med & Surg, Dept Biomed Sci, Human Nutr Chair, I-41100 Modena, Italy
[2] Univ Modena & Reggio Emilia, Geriatr Chair, Modena, Italy
关键词
D O I
10.1080/03014460210137819
中图分类号
Q98 [人类学];
学科分类号
030303 ;
摘要
Primary objective: To study the relationship between bone mineral content (BMC), lean tissue mass (LTM) and fat mass (FM) in a large sample of young and elderly women. Research design: Cross-sectional. Methods and procedures: BMC, LTM and FM were measured by dual-energy X-ray absorptiometry in 2009 free-dwelling Caucasian women aged 63 +/- 7 years (mean +/- SD; range: 37-88 years). The majority of women were postmenopausal (96%). Results: LTM explained 13% more variance of BMC than FM (R-adj(2) = 0.39 vs 0.26, p < 0.0001) but weight (Wt) explained 5% more variance of BMC than LTM (R-adj(2) = 0.44, p < 0.0001). The prediction of BMC obtained from LTM and FM (R-adj(2) = 0.46, p < 0.0001) was only slightly better than that obtained from Wt. After the effects of age, Wt and height (Ht) on BMC were taken into account by multiple regression, the contribution of LTM and FM to BMC was just one-fifth of that of Wt (R-ad(2) for full models less than or equal to0.56, p < 0.0001). After a further correction for bone area (BA), the contribution of LTM and FM to BMC was just one-tenth of that of BA and not different from that of Wt and Ht on practical grounds (R-adj(2) for full models = 0.84, p < 0.0001). Thus, after interindividual differences in age, Wt, Ht (and bone size) are taken into account, the relationship between body composition and BMC is substantially weakened. Conclusions: In Caucasian women, (1) LTM is a stronger predictor of BMC than FM, but (2) Wt is a better predictor of BMC than body composition for practical purposes, and (3) Wt and body composition are not able to explain more than 46% of BMC variance.
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页码:559 / 565
页数:7
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