Results 251 to 260 of about 24,776,592 (282)

Vitamin D testing

The Lancet, 2012
www.thelancet.com Vol 379 May 5, 2012 1699 Submissions should be made via our electronic submission system at http://ees.elsevier.com/ thelancet/ programme (Vitamin D External Quality Assessment Scheme [DEQAS]) has been developed inter nationally. Until a better standardisation is achieved in routine practice, we urge clinicians not only to stop and ...
Stewart, Pattman, Richard, Quinton, Simon, Pearce, Harish, Datta   +3 more
  +10 more sources

The rise and rise of vitamin D testing

BMJ, 2012
Moynihan and colleagues’ report highlights the increasing trend for overdiagnosis, particularly of endocrine disorders.1 Similar concerns exist for overdiagnosis and overtreatment of vitamin D deficiency.2 3 Currently, the appropriate timing and frequency of testing for the diagnosis of vitamin D deficiency is unclear. The cost of testing in …
Bilinski, Kellie (R18510), Boyages, Steven C.   +1 more
openaire   +3 more sources

Vitamin D testing: advantages and limits of the current assays

European Journal of Clinical Nutrition, 2020
Vitamin D deficiency and insufficiency has become a pandemic health problem with a consequent increase of requests for determining circulating levels of 25-hydroxyvitamin D [25(OH)D]. However, the analytical performance of these immunoassays, including radioimmunoassay and ELISA, is highly variable, and even mass spectrometric methods, which nowadays ...
Barbara Altieri, Etienne Cavalier, Harjit Pal Bhattoa, Faustino R. Pérez-López, María T. López-Baena, Gonzalo R. Pérez-Roncero, Peter Chedraui, Cedric Annweiler, Silvia Della Casa, Sieglinde Zelzer, Markus Herrmann, Antongiulio Faggiano, Annamaria Colao, Michael F Holick   +13 more
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Pathology Consultation on Vitamin D Testing

American Journal of Clinical Pathology, 2011
The last decade has seen a substantial increase in clinical interest in vitamin D deficiency and of laboratory testing for vitamin D status. Many clinical laboratories in the United States have seen requests for vitamin D testing increase 100% or more in the last 5 years.
openaire   +2 more sources

D-test spaces and difference posets

Reports on Mathematical Physics, 1994
The authors introduce the notion of a D-test space generalizing the Kolmogorov probability model, orthomodular posets, and the test spaces of Foulis and Randall. They study a tensor product of D-test spaces. Let \({\mathcal T} \subseteq \{F \in X^ I : I \in {\mathcal I} \}\) be nonempty, where \(X \neq \emptyset\) and \({\mathcal I}\) is a nonvoid ...
Dvurečenskij, Anatolij, Pulmannová, Sylvia   +1 more
openaire   +2 more sources

Prevalence of biochemical osteomalacia in adults undergoing vitamin D testing

Clinical Endocrinology, 2021
AbstractObjectiveProlonged severe vitamin D deficiency can cause osteomalacia, but the 25‐hydroxyvitamin D (25OHD) concentration below which this occurs is unknown. We investigated the prevalence of biochemical osteomalacia in adults with a measurement of 25OHD.Design, Measurement, and Patients25OHD results between 1/1/2009 and 15/6/2020 were obtained ...
Mark J. Bolland, Alison Avenell, Andrew Grey   +2 more
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2-D test for robust stability of polytopes of quasipolynomials

2006 American Control Conference, 2006
The characteristic functions of polytopes of recursive time-delay systems are polytopes of quasipolynomials. Since the roots of quasipolynomials are infinite, to be different from that of 1D polynomials, the analysis for robust stability of polytopes of quasipolynomials is much more complicated than 1D case. By a complex variable transformation in this
Yang Xiao, Moon-Ho Lee
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Tensor products of D-posets and D-test spaces

Reports on Mathematical Physics, 1994
A \(D\)-poset (or a difference poset) is a poset \(L\) with the greatest element 1 and a partial binary operation \(\ominus: L\times L\to L\) such that \(b\ominus a\) is defined iff \(a\leq b\) and, for \(a,b, c\in L\), we have (i) \(b\ominus a\leq b\); (ii) \((b\ominus (b\ominus a))=a\); (iii) if \(a\leq b\leq c\), then \(c\ominus b\leq c\ominus a ...
Dvurečenskij, Anatolij, Pulmannová, Sylvia   +1 more
openaire   +1 more source

NYSOA K-D test.

Journal of the American Optometric Association, 1983
An objective indirect method of evaluating saccadic performance is of interest to optometrists and non optometrists. A sample of 1202 children ages six to fourteen were screened using the New York State Optometric Association Vision Screening Battery. The NYSOA K-D Test was part of that battery.
S, Lieberman, A H, Cohen, J, Rubin
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