Correlation between MCI/Sapori screening tools and DXA results and between MCI/Sapori and Frax tool for estimating fracture risk

  • Ricardo The Chen Universidade de São Paulo
  • Isabela Goulart Gil Choi Universidade de São Paulo
  • Luciana Munhoz Universidade de São Paulo
  • Erika Miti Yasui Universidade de São Paulo
  • Christyan Hiroshi Iida Universidade de São Paulo
  • Natalia Isis Caires Lavor Universidade de São Paulo
  • Emiko Saito Arita Universidade de São Paulo
Keywords: Osteoporosis, Panoramic Radiography, Bone Mineral Density, Brazil, Software Tools

Abstract

Background: Peripheral Dual-energy X-ray absorptiometry (DXA) can be applied to identify low bone mineral density (BMD) patients, however, DXA is not sufficiently available in many countries. Thus, the use of simpler and cheaper screening tools than DXA to detect low BMD become indispensable. Objectives: The objective of this study was to correlate São Paulo osteoporosis risk index (Sapori) and mandibular cortical index (MCI) screening tools with the femur DXA results of patients in our sample of Brazilian women. A secondary objective was to assess which of these screening tools better correlates with the results of the Frax tool. Material and Methods: Exams of women who had undergone panoramic radiographic examination at the beginning of dental treatment and peripheral DXA for screening osteoporosis from 2010 to 2014 were included. The MCI was evaluated, and Sapori and Frax were calculated with their available online software tools. Spearman correlation was performed to analyse the level of correlation between femur T-scores (and MCI and Sapori values, as well to perform the level of correlation between Frax and MCI and Sapori values. Results: The spearman correlation comparing the numerical T-score values and the categorical values of MCI (rs=-0.274), and of Sapori (rs=-0.470), showed a statistically significant inverse correlation for both equations (p<0.01). The Spearman equation comparing the values obtained with Frax and MCI did not show a statistically signifcant correlation (p>0.01). But the equation comparing the values obtained with Frax and Sapori showed a positive, moderate and statistically significant correlation between them (rs=0.460). Conclusion: MCI is not a reliable screening tool to identify women with low BMD or Osteoporosis, whereas more optimistic results were observed for the Sapori.

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Author Biographies

Ricardo The Chen, Universidade de São Paulo

Department of Stomatology, School of Dentistry, University of São Paulo, São Paulo, Brazil.

Isabela Goulart Gil Choi, Universidade de São Paulo

Department of Stomatology, School of Dentistry, University of São Paulo, São Paulo, Brazil.

Luciana Munhoz, Universidade de São Paulo

Department of Stomatology, School of Dentistry, University of São Paulo, São Paulo, Brazil.

Erika Miti Yasui, Universidade de São Paulo

Department of Stomatology, School of Dentistry, University of São Paulo, São Paulo.

Christyan Hiroshi Iida, Universidade de São Paulo

Department of Stomatology, School of Dentistry, University of São Paulo, São Paulo, Brazil.

Natalia Isis Caires Lavor, Universidade de São Paulo

Department of Stomatology, School of Dentistry, University of São Paulo, São Paulo, Brazil.

Emiko Saito Arita, Universidade de São Paulo

Department of Stomatology, School of Dentistry, University of São Paulo, São Paulo, Brazil

Published
2019-10-09
Issue
Section
Original Research