FRAX calculated without BMD does not correctly identify Caucasian men with densitometric evidence of osteoporosis

R C Hamdy1, E Seier2, K Whalen3

  • 1Osteoporosis Center, East Tennessee State University, Johnson City, TN, 37614, USA. Hamdy@etsu.edu.

Insights

The FRAX tool, without bone mineral density (BMD) data, is not sensitive or specific enough to identify osteoporosis in Caucasian men aged 50-70. Further evaluation is needed for accurate osteoporosis diagnosis in this demographic.

Area of Science:

  • Endocrinology
  • Geriatrics
  • Bone Metabolism

Background:

  • Osteoporosis diagnosis relies on bone mineral density (BMD), fragility fractures, or elevated fracture risk.
  • The FRAX algorithm estimates 10-year osteoporotic fracture probability, calculable with or without BMD data.

Purpose of the Study:

  • To evaluate the accuracy of the FRAX tool, when used without BMD data, in identifying osteoporosis in men.
  • To determine if FRAX scores without BMD can correctly identify patients with BMD-defined osteoporosis in a male cohort.

Main Methods:

  • Retrospective analysis of data from 726 Caucasian males aged 50-70 years.
  • FRAX scores were calculated and compared against BMD-defined osteoporosis thresholds.

Main Results:

  • Using female reference populations, 11.8% of men had osteoporosis; using male reference populations, 25.3% had osteoporosis.
  • When using National Osteoporosis Foundation thresholds, only 27% of patients with osteoporosis met treatment criteria, while 4% with normal BMD did.
  • Adjusting thresholds improved sensitivity but reduced specificity.

Conclusions:

  • FRAX assessment without BMD data lacks sufficient sensitivity and specificity for identifying osteoporosis in Caucasian men aged 50-70.
  • Current FRAX application without BMD may lead to misdiagnosis or delayed treatment initiation in this population.

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