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Lower values represent varying degrees of suppression of normal bone turnover, sometimes also called bone remodeling or bone renewal." [1] Patients who are placed on a 6-month drug holiday exhibit marked improvements in their serum CTX values; in one study, patients showed an improvement of 155.3 pg/mL over 6 months or a rate of 25.9 pg/mL each ...
Reference ranges (reference intervals) for blood tests are sets of values used by a health professional to interpret a set of medical test results from blood samples. Reference ranges for blood tests are studied within the field of clinical chemistry (also known as "clinical biochemistry", "chemical pathology" or "pure blood chemistry"), the ...
FRAX (fracture risk assessment tool) is a diagnostic tool used to evaluate the 10-year probability of bone fracture risk. It was developed by the University of Sheffield. [1]
The trabecular bone score is a measure of bone texture correlated with bone microarchitecture and a marker for the risk of osteoporosis.Introduced in 2008, [1] its main projected use is alongside measures of bone density in better predicting fracture risk in people with metabolic bone problems.
Dual-energy X-ray absorptiometry (DEXA scan) is considered the gold standard for the diagnosis of osteoporosis. Osteoporosis is diagnosed when the bone mineral density is less than or equal to 2.5 standard deviations below that of a young (30–40-year-old [4]:58), healthy adult women reference population.
The World Health Organization (WHO) has established a diagnostic criteria for osteoporosis using BMD T-scores which describes an individual's BMD in terms of the number of SDs by which is differs from the mean peak value in young, healthy persons of the same sex—currently more than 2.5 SDs below the mean as the criterion for osteoporosis. [5]
The standard definition of a reference range for a particular measurement is defined as the interval between which 95% of values of a reference population fall into, in such a way that 2.5% of the time a value will be less than the lower limit of this interval, and 2.5% of the time it will be larger than the upper limit of this interval, whatever the distribution of these values.
Additionally further tests can be completed to rule out other causes and complications of hyperparathyroidism including a 24-hour urinary calcium for familial hypocalciuric hypercalcemia, DEXA scan to evaluate for osteoporosis, osteopenia, or fragility fractures, and genetic testing.