Reliability of Analysis of the Bone Mineral Density of the Second and Fifth Metatarsals Using Dual-energy X-ray Absorptiometry (DXA)

Overview

Journal J Foot Ankle Res

Publisher Wiley

Specialty Orthopedics

Date 2017 Dec 7

PMID 29209416

Citations 1

Authors

N Stewart Pritchard

James M Smoliga

Anh-Dung Nguyen

Micah C Branscomb

David R Sinacore

Jeffrey B Taylor

Kevin R Ford

Affiliations

Soon will be listed here.

Abstract

Background: Metatarsal fractures, especially of the fifth metatarsal, are common injuries of the foot in a young athletic population, but the risk factors for this injury are not well understood. Dual-energy x-ray absorptiometry (DXA) provides reliable measures of regional bone mineral density to predict fracture risk in the hip and lumbar spine. Recently, sub-regional metatarsal reliability was established in fresh cadaveric specimens and associated with ultimate fracture force. The purpose of this study was to assess the reliability of DXA bone mineral density measurements of sub-regions of the second and fifth metatarsals in a young, active population.

Methods: Thirty two recreationally active individuals participated in the study, and the bone density of the second (2MT) and fifth (5MT) metatarsals of each subject was measured using a Hologic QDR x-ray bone densitometer. Scans were analyzed separately by two raters, and regional bone mineral density, bone mineral content, and area measurements were calculated for the proximal, shaft, and distal regions of the bone. Intra-rater, inter-rater, and scan-rescan reliability were then determined for each region.

Results: Proximal and shaft bone mineral density measurements of the second and fifth metatarsal were reliable. ICC's were variable across regions and metatarsals, with the distal region being the poorest.

Conclusions: Bone mineral density measurements of the metatarsals may be a better indicator of fracture risk of the metatarsals than whole body measurements. A reliable method for measuring the regional bone mineral densities of the metatarsals was found. However, inter-rater reliability and scan-rescan reliability for the distal regions were poor. Future research should examine the relationship between DXA bone mineral density measurements and fracture risk at the metatarsals.

Citing Articles

Fifth metatarsal fractures: an update on management, complications, and outcomes.

Chloros G, Kakos C, Tastsidis I, Giannoudis V, Panteli M, Giannoudis P EFORT Open Rev. 2022; 7(1):13-25.

PMID: 35073515 PMC: 8788151. DOI: 10.1530/EOR-21-0025.

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