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WHO Criteria
The World Health Organization (WHO) has defined criteria for assessing bone status and determining the risk of fracture (osteoporosis).* These criteria are defined by "T-score," which is the number of standard deviations by which a subject's result exceeds
(positive T-score) or falls below (negative T-score) the mean of the young adult group.
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| Normal healthy bone |
= |
-1<T-Score |
| Osteopenia |
= |
-2.5 <T-Score <-1 |
| Osteoporosis |
= |
T-Score <-2.5 |
| Severe Osteoporosis |
= |
T-score <-2.5 and an evidence
of a low trauma fracture |
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Database Comparison
An examination of the Omnisense reference databases shows that the WHO criteria for the definition of osteoporosis
can be applied to Omnisense measurements. When comparing reference data curves of various bone assessment devices in
terms of T-score, we find that the Omnisense database indicates a prevalence of osteoporosis among post-menopausal women similar to that
identified by the WHO Study Group that defined the criteria for osteoporosis - approximately 35% in the 60-90 female North American group.
*"Assessment of Fracture Risk and its Application to Screening for Postmenopausal Osteoporosis," Report of a WHO Study Group,
WHO Technical Report Series #843, World Health Organization, Geneva 1994; M. Weiss.
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