Densitometrists routinely find inconsistent T-score assessments when studies are completed on AP Spine and Hip regions. This study investigated T-score assessments of AP Spine and Hip studies in a clinical population to assess expectations and tendencies in regional T-score values. T-score assessments in AP Spine (L2-L4) and Hip (FN, Troc, Wards and Total) were obtained from 1,163 clinical subjects between 21 and 88 years of age using an Norland XR-800. All studies were audited to confirm good methodology. The frequency with which one region identified t-score determined osteoporosis or osteopenia in another region was computed for the various regions. Frequency with which scan sites identify T-score determined Osteoporosis or Osteopenia at other sites.
Our studies document inconsistent results in AP Spine and Hip Regional T-score results. The most consistent finding was that an osteoporosis at the Spine, Femur Neck or Trochanter was likely to be accompanied with low results in the Wards region. These inconsistent results can be expected given differences in mechanical forces and the trabecular and cortical contents of these sites. In conclusion, AP Spine and Hip assessments can be expected to reveal different results. We therefore suggest attention be paid to the spine and the individual hip regions.
Disclosure: The authors declared no competing interests.