Associations between body composition and bone loss in early postmenopausal women.

IF 5.9 1区 医学 Q1 ENDOCRINOLOGY & METABOLISM
Marina Vilar Geraldi, Giulia Gregori, Lisa Johansson, Ulrika Hjertonsson, Emma Brättemark, Mattias Lorentzon
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Abstract

The early postmenopausal period is characterized by rapid bone loss, accompanied by a decline in lean mass and an increase in fat mass, highlighting the importance of understanding how these changes influence bone health. This study aimed to assess the cross-sectional and longitudinal associations between body composition and bone characteristics in early postmenopausal women using linear mixed models for repeated measures. A total of 223 Swedish women, aged 50-60 and within 1-4 yr postmenopause, were followed for 2 yr as part of the ELBOW II clinical trial. Body composition-body weight, appendicular lean mass (ALM), and fat mass-was assessed by DXA. Bone outcomes included areal BMD at the TH, FN, LS (DXA), as well as tibia bone microarchitecture and volumetric BMD (vBMD), measured by HR-pQCT. Higher baseline body weight, BMI, fat mass, and ALM were significantly associated with greater cortical area, cortical vBMD, and total vBMD. Baseline body weight, BMI, and fat mass, but not ALM, were positively associated with TH BMD. Longitudinally, increases in ALM were significantly associated with favorable changes in TH BMD, LS BMD, total vBMD, trabecular bone volume fraction, and cortical area. Changes in body weight and BMI were associated with multiple bone outcomes, while fat mass change was linked only with cortical area. In exploratory group comparisons, women with low baseline fat mass (28.14%) and greater ALM loss (∆% ALM: -2.87 kg) experienced 2.4-fold and 5.2-fold greater reductions in TH BMD and tibia total vBMD, respectively, compared to those with high fat mass and maintained ALM. These findings underscore the importance of maintaining or increasing lean mass and preserving overall body weight to mitigate bone loss and reduce skeletal fragility in early postmenopausal women.

早期绝经后妇女身体成分与骨质流失之间的关系。
绝经后早期的特点是骨质迅速流失,伴随着瘦体重的下降和脂肪量的增加,强调了了解这些变化如何影响骨骼健康的重要性。本研究旨在通过重复测量的线性混合模型来评估早期绝经后妇女身体成分和骨骼特征之间的横断面和纵向关联。共有223名瑞典女性,年龄在50-60岁,绝经后1-4年,作为肘关节II临床试验的一部分,随访2年。体组成-体重、阑尾瘦质量(ALM)和脂肪质量采用DXA评估。骨结果包括TH、FN、LS (DXA)的面积骨密度,以及通过HR-pQCT测量的胫骨骨微结构和体积骨密度(vBMD)。较高的基线体重、BMI、脂肪量和ALM与较大的皮质面积、皮质vBMD和总vBMD显著相关。基线体重、BMI和脂肪量与TH BMD呈正相关,但与ALM无关。纵向上,ALM的增加与TH骨密度、LS骨密度、总vBMD、小梁骨体积分数和皮质面积的有利变化显著相关。体重和BMI的变化与多种骨骼结果相关,而脂肪量的变化仅与皮质面积有关。在探索性组比较中,基线脂肪量低(28.14%)和ALM损失较大(∆% ALM: -2.87 kg)的女性,与高脂肪量和维持ALM的女性相比,TH骨密度和胫骨总vBMD分别下降了2.4倍和5.2倍。这些发现强调了维持或增加瘦体重和保持整体体重对于减轻早期绝经后妇女的骨质流失和减少骨骼脆弱性的重要性。
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来源期刊
Journal of Bone and Mineral Research
Journal of Bone and Mineral Research 医学-内分泌学与代谢
CiteScore
11.30
自引率
6.50%
发文量
257
审稿时长
2 months
期刊介绍: The Journal of Bone and Mineral Research (JBMR) publishes highly impactful original manuscripts, reviews, and special articles on basic, translational and clinical investigations relevant to the musculoskeletal system and mineral metabolism. Specifically, the journal is interested in original research on the biology and physiology of skeletal tissues, interdisciplinary research spanning the musculoskeletal and other systems, including but not limited to immunology, hematology, energy metabolism, cancer biology, and neurology, and systems biology topics using large scale “-omics” approaches. The journal welcomes clinical research on the pathophysiology, treatment and prevention of osteoporosis and fractures, as well as sarcopenia, disorders of bone and mineral metabolism, and rare or genetically determined bone diseases.
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