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Titolo:
pQCT measurement of bone parameters in young children - Validation of technique
Autore:
Binkley, TL; Specker, BL;
Indirizzi:
S Dakota State Univ, Ethel Austin Martin Program Human Nutr, Brookings, SD57007 USA S Dakota State Univ Brookings SD USA 57007 n Nutr, Brookings, SD57007 USA Univ S Dakota, Sch Med, Dept Pediat, Brookings, SD USA Univ S Dakota Brookings SD USA , Sch Med, Dept Pediat, Brookings, SD USA
Titolo Testata:
JOURNAL OF CLINICAL DENSITOMETRY
fascicolo: 1, volume: 3, anno: 2000,
pagine: 9 - 14
SICI:
1094-6950(200021)3:1<9:PMOBPI>2.0.ZU;2-1
Fonte:
ISI
Lingua:
ENG
Soggetto:
COMPUTED-TOMOGRAPHY; ABSORPTIOMETRY; ACCURACY; BODY;
Keywords:
peripheral quantitative computed tomography (pQCT); cortical density; total cross-sectional area; cortical area; cortical thickness;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Clinical Medicine
Citazioni:
10
Recensione:
Indirizzi per estratti:
Indirizzo: Binkley, TL S Dakota State Univ, Ethel Austin Martin Program Human Nutr, Box 2204, Brookings, SD 57007 USA S Dakota State Univ Box 2204 Brookings SD USA 57007 57007 USA
Citazione:
T.L. Binkley e B.L. Specker, "pQCT measurement of bone parameters in young children - Validation of technique", J CLIN DENS, 3(1), 2000, pp. 9-14

Abstract

Dual-energy X-ray absorptiometry (DXA) measures areal bone mineral density(BMD) and is affected by bone size. Peripheral quantitative computed tomography (pQCT) measures volumetric density and should not be affected by bonesize. We hypothesized that pQCT could be used to measure geometric parameters in the tibia and that bone size, not density, would correlate with weight and height in 3 and 4 yr olds. Phantom measurements indicate that accurate results for cortical volumetric bone mineral density can be obtained at cortical thickness > 2 mm with voxel/speed sizes of 0.40/20 mm/s, Correlations between pQCT measured geometric bone parameters and phantom calculations were observed (all r > 0.96). Baseline data from an ongoing trial of 101 preschool children (53 male) were used to correlate bone parameters and anthropometrics. Total cross-sectional area, cortical area, and cortical thickness correlated with weight (r = 0.54, p < 0.001; r = 0.52, p < 0.001; r = 0.30, p = 0.002) and height (r = 0.41, p < 0.001; r = 0.55, p < 0.001; r = 0.41, p < 0.001). Because of the small cortical thickness at this age (mean= 1.2 mm), the cortical density was not analyzed. In a regression model including height and weight, weight was the only predictor of total cross-sectional area (p < 0.001); cortical thickness was predicted by height (p = 0.006). Both height (p = 0.005) and weight (p = 0.05) predicted the cortical area. In summary, pQCT accurately measures the total cross-sectional area, cortical area, and cortical thickness in children age 3-4 yr.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 04/12/20 alle ore 05:43:20