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Significance of the ionized calcium measurement to assess calcium status in osteopenic/osteoporosis postmenopausal outpatients.
- Source :
-
Gynecological endocrinology : the official journal of the International Society of Gynecological Endocrinology [Gynecol Endocrinol] 2017 May; Vol. 33 (5), pp. 383-388. Date of Electronic Publication: 2017 Jan 19. - Publication Year :
- 2017
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Abstract
- Introduction: Evaluation of calcium status is important in the osteoporotic risk assessment. Although guidelines indicate total calcium (tCa) as first-line measurement, directly measured ionized calcium (m-iCa), considered as the gold standard, is more and more often required. Aim of this study is to evaluate the agreement between m-iCa, tCa and iCa calculated from a formula based on total calcium and albumin (c-iCa) in osteopenic/osteoporotic postmenopausal outpatients.<br />Methods: A total of 140 postmenopausal outpatients, 41 osteopenic (OPN) and 99 osteoporotic (OP) were enrolled. Levels of tCa, m-iCa, c-iCa, total protein and albumin, vitamin D (25-OHD), parathyroid hormone 1-84 (PTH), bone alkaline phosphatase, osteocalcin and serum collagen type 1 cross-linked C-telopeptide (CTX) were also measured.<br />Results: There were no statistically significant differences between OPN and OP groups regarding values of tCa, m-iCa, and c-iCa, 25-OHD and PTH. However, OP women had lower levels of CTX (p < 0.05). A significant direct correlation between m-iCa and tCa (r = 0.60, p < 0.001) and c-iCa (r = 0.61, p < 0.001) was found. Women with isolated hyper-m-iCa had similar DEXA parameter levels respect to the other patients. However, one patient with confirmed primary hyperparathyroidism presented hyper-m-iCa versus normal tCa and c-iCa values.<br />Conclusions: The use of tCa could be sufficient to characterize the calcium status in postmenopausal outpatients, but reflexive calcium testing strategy for m-iCa test is necessary to women presenting the low or high extremes of tCa levels, or in women with suspected PHPT.
Details
- Language :
- English
- ISSN :
- 1473-0766
- Volume :
- 33
- Issue :
- 5
- Database :
- MEDLINE
- Journal :
- Gynecological endocrinology : the official journal of the International Society of Gynecological Endocrinology
- Publication Type :
- Academic Journal
- Accession number :
- 28102095
- Full Text :
- https://doi.org/10.1080/09513590.2016.1270932