Skeletal Radiology

, Volume 45, Issue 1, pp 135–140 | Cite as

The reliability of dual-energy X-ray absorptiometry measurements of bone mineral density in the metatarsals

  • Joel T Fuller
  • Jane Archer
  • Jonathan D Buckley
  • Margarita D Tsiros
  • Dominic Thewlis
Technical Report

Abstract

Objective

To investigate the reliability of a simple, efficient technique for measuring bone mineral density (BMD) in the metatarsals using dual-energy X-ray absorptiometry (DXA).

Materials and methods

BMD of the right foot of 32 trained male distance runners was measured using a DXA scanner with the foot in the plantar position. Separate regions of interest (ROI) were used to assess the BMD of each metatarsal shaft (1st–5th) for each participant. ROI analysis was repeated by the same investigator to determine within-scan intra-rater reliability and by a different investigator to determine within-scan inter-rater reliability. Repeat DXA scans were undertaken for ten participants to assess between-scan intra-rater reliability.

Results

Assessment of BMD was consistently most reliable for the first metatarsal across all domains of reliability assessed (intra-class correlation coefficient [ICC] ≥0.97; coefficient of variation [CV] ≤1.5 %; limits of agreement [LOA] ≤4.2 %). Reasonable levels of intra-rater reliability were also achieved for the second and fifth metatarsals (ICC ≥0.90; CV ≤4.2 %; LOA ≤11.9 %). Poorer levels of reliability were demonstrated for the third (ICC ≥0.64; CV ≤8.2 %; LOA ≤23.6 %) and fourth metatarsals (ICC ≥0.67; CV ≤9.6 %; LOA ≤27.5 %). BMD was greatest in the first and second metatarsals (P < 0.01).

Conclusion

Reliable measurements of BMD were achieved for the first, second and fifth metatarsals.

Keywords

Dual-energy X-ray absorptiometry Bone mineral density Metatarsal Reliability 

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Copyright information

© ISS 2015

Authors and Affiliations

  • Joel T Fuller
    • 1
  • Jane Archer
    • 2
  • Jonathan D Buckley
    • 1
  • Margarita D Tsiros
    • 1
  • Dominic Thewlis
    • 1
  1. 1.Alliance for Research in Exercise, Nutrition and Activity (ARENA), Sansom Institute for Health ResearchUniversity of South AustraliaAdelaideAustralia
  2. 2.Medical Radiation, School of Health SciencesUniversity of South AustraliaAdelaideAustralia

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