Peripheral quantitative computed tomography (pQCT) in 12-and 24-month-old children - Practical aspects and descriptive data

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Valkama , S , Holmlund-Suila , E , Ireland , A , Hauta-alus , H , Enlund-Cerullo , M , Rosendahl , J , Andersson , S & Mäkitie , O 2020 , ' Peripheral quantitative computed tomography (pQCT) in 12-and 24-month-old children - Practical aspects and descriptive data ' , Bone , vol. 141 , 115670 .

Title: Peripheral quantitative computed tomography (pQCT) in 12-and 24-month-old children - Practical aspects and descriptive data
Author: Valkama, Saara; Holmlund-Suila, Elisa; Ireland, Alex; Hauta-alus, Helena; Enlund-Cerullo, Maria; Rosendahl, Jenni; Andersson, Sture; Mäkitie, Outi
Contributor organization: Children's Hospital
HUS Children and Adolescents
CAMM - Research Program for Clinical and Molecular Metabolism
Research Programs Unit
Faculty of Medicine
University of Helsinki
HUS Medical Imaging Center
Lastentautien yksikkö
Date: 2020-12
Language: eng
Number of pages: 9
Belongs to series: Bone
ISSN: 8756-3282
Abstract: Background: Peripheral quantitative computed tomography (pQCT) is a useful tool to assess detailed bone characteristics. Its utility in infants is however limited due to lack of reference data and technical challenges. The purpose of this study was to provide data on length- and weight-adjusted pQCT values and to present a quality grading system for healthy children aged 12 and 24 months. Material and methods: As a part of the Vitamin D intervention in Infants (VIDI) trial, we collected pQCT and anthropometric data from 855 children at 12 months and from 784 children at 24 months. Bone mineral content (BMC; mg/mm), volumetric bone mineral density (vBMD; mg/cm(3)), cross-sectional area (CSA; mm(2)), polarmoment of inertia (PMI; mm(4)), and periosteal circumference (PsC; mm) were assessed for total bone at 20% distal site of the left tibia using pQCT (Stratec XCT2000L). We evaluated the impact of scan quality on bone measures. Total bone parameters were assessed for boys and girls separately. The means of the bone parameters were also compared in relation to age. The associations between bone parameters and weight, length, sex and scan quality were analyzed. Results: We included scans with sufficient quality (Grade 1-5) in the final analyses: 679/855 (79%) at 12 months and 709/784 (90%) at 24 months. Altogether 39% of the scans at 12 months and 51% at 24 months were of good or excellent quality (Grade 1-2). Scan quality had an impact on BMCs at 12 and 24 months (p = 0.001 and p = 0.017, respectively) but not on other bone parameters. Boys presented greater total bone BMC, CSA, PMI and PsC values at 12 and 24 months but vBMDs were similar. All bone parameters showed a significant increase between 12 and 24 months for both sexes. When adjusting bone parameters for weight, length and scan quality, differences between sexes disappeared. Weight was the strongest modifier of BMC, CSA, PMI and PsS at 12 and 24 months. Conclusions: This study increases our understanding on bone parameters in young children and demonstrates the suitability of pQCT in bone research in infants. The described pQCT data and scan quality grading system should prove useful in evaluating data reliability in research settings. Clinical trial registration number: NCT1723852
Subject: pQCT
Cross-sectional area
Polar moment of inertia
Periosteal circumference
3126 Surgery, anesthesiology, intensive care, radiology
Peer reviewed: Yes
Rights: cc_by_nc_nd
Usage restriction: openAccess
Self-archived version: acceptedVersion

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