Calcium and vitamin-D supplementation on bone structural properties in peripubertal female identical twins: a randomised controlled trial
- نوع فایل : کتاب
- زبان : انگلیسی
- مؤلف : D. A. Greene & G. A. Naughton
- چاپ و سال / کشور: 2010
Description
Summary A randomised controlled trial was used in assessing the impact of 6 months of daily calcium and vitamin-D supplementation on trabecular and cortical bone acquisition at distal tibial and radial sites using peripheral quantitative computed tomography (pQCT). Daily supplementation was associated with increased bone density and bone strength at the distal tibia and radius. Introduction pQCT has not been used to assess bone responses to calcium and vitamin-D supplementation on peripubertal children. This randomised controlled trial aimed to assess the impact of a 6-month daily calcium and vitamin-D supplementation on trabecular and cortical bone acquisition at distal tibial and radial sites using pQCT. Methods Twenty pairs of peripubertal female identical twins, aged 9 to 13 years, were randomly assigned to receive either 800 mg of calcium and 400 IU of vitamin D3, or a matched placebo. Bone structural properties at the distal tibia and distal radius were acquired at baseline and 6 months. Results The calcium-supplemented group showed greater gains in trabecular density, trabecular area and strength strain index at the 4% of distal tibial and radial sites compared with the placebo group (p=0.001). Greater gains in cortical area at the 38% and 66% of tibial sites were also found in twins receiving the calcium supplement (p=0.001). Conclusions Daily supplementation for a period of 6 months was associated with increased trabecular area, trabecular density and strength strain index at the ultradistal tibia and radius and increased cortical area at tibial mid-shaft.
Osteoporos Int (2011) 22:489–498 DOI 10.1007/s00198-010-1317-z Received: 23 August 2009 / Accepted: 11 May 2010 / Published online: 11 June 2010
