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  • Title: Assessment of four biochemical markers of bone metabolism in postmenopausal osteoporosis.
    Author: Majkić-Singh N, Ilić M, Ignjatović S, Aleksandra-Postić-Grujin.
    Journal: Clin Lab; 2002; 48(7-8):407-13. PubMed ID: 12146575.
    Abstract:
    In order to sudy the specificity and sensitivity of markers of bone metabolism in postmenopausal osteoporosis we investigated bone alkaline phosphatase, osteocalcin and carboxyl-terminal propeptide of procollagen type I in sera as markers of bone formation, and deoxypyridinoline in urine as a marker of bone resorption. The investigated parameters were determined in 53 women with confirmed osteoporosis and in a control group consisting of 45 healthy postmenopausal women without bone changes who were 40 to 79 years old. All biochemical markers were determined by monoclonal competitive enzyme immunoassay tests obtained by Metra Biosystems. The activity of bone alkaline phosphatase and the concentration of osteocalcin, procollagen type IVC-terminal propeptide (PICP), and deoxypyridinoline were grouped according to age of postmenopausal healthy and osteoporotic women. The values of all bone markers gradually increased with age, but significantly higher values were obtained in groups of postmenopausal osteoporotic women. By using receiver operator characteristic curve analysis, a very high specificity and sensitivity of the investigated biochemical markers in the diagnosis of postmenopausal osteoporosis were proven. The areas under the PICP curve and the osteocalcin curve were significantly higher than the area under the deoxypyridinoline curve, demonstrating a higher discriminating power of PICP and osteocalcin than deoxypyridinoline (p < 0.05).
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