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Ann Rheum Dis 66:271-272 doi:10.1136/ard.2006.062372
  • Letter

Prevalence and risk factors of discordance in diagnosis of osteoporosis using spine and hip bone densitometry

  1. Abdellah El Maghraoui,
  2. Davy A Mouinga Abayi,
  3. Imad Ghozlani,
  4. Aziza Mounach,
  5. Abderrazak Nouijai,
  6. Mirieme Ghazi,
  7. Lahsen Achemlal,
  8. Ahmed Bezza
  1. Rheumatology and Physical Rehabilitation Department, Military Hospital Mohammed V, Rabat, Morocco
  1. Correspondence to:
    Professor A El Maghraoui
    Rheumatology and Physical Rehabilitation Department, Military Hospital Mohammed V, PO Box 1018, Rabat, Morocco; a_elmaghraoui{at}menara.ma
  • Accepted 2 November 2006

Dual x ray absorptiometry is the reference method to measure bone mineral density (BMD) accurately and reproducibly. The World Health Organization defines osteoporosis on the basis of the T score (which is the difference between the measured BMD and the mean value of young adults, expressed in standard deviations for a normative population of the same ethnicity).1 Although the BMD at different anatomical regions is correlated, the agreement between sites is low when it comes to classifying individual subjects as having osteoporosis.2 Various studies have analysed the prevalence and effect of T score discordance on the management of osteoporosis.3–7 However, most of these studies did not evaluate risk factors for this phenomenon. Thus, …