25(OH)D Measurement and 25(OH)D Deficiency
Conditions
Keywords
25(OH)D, PTH, mass spectrometry, data mining
Brief summary
The present study assessed serum 25(OH)D in a cohort of 74235 outpatients by liquid-chromatography-tandem-mass-spectrometry (LC-MS/MS). The investigators studied the distribution of serum 25(OH)D concentrations in males and females of different age groups, the prevalence of measurable amounts of 25(OH)D2 and seasonal variability.
Detailed description
Measurements were performed under routine circumstances. Samples were collected in serum tubes with clot-activator. As per routine procedure, samples were centrifuged upon arrival in the lab and stored at 4° C until measurement. 25(OH)D3 and 25(OH)D2 were quantitated separately. Results from subjects \<18 years were excluded from the analysis. The study was approved by the local Ethics Committee.
Interventions
DIAGNOSTIC_TEST25(OH)D measurement, PTH measurement
25(OH)D analyses by LC-MS/MS were performed as part of our routine clinical work with a commercial kit from Recipe (Munich, Germany) ; PTH was measured in lithium-heparin plasma using the PTH STAT assay from Roche Diagnostics (Mannheim, Germany) on a Cobas 8000 auto-analyzer.
Sponsors
Azienda Ospedaliera di Bolzano
Study design
Observational model
COHORT
Time perspective
RETROSPECTIVE
Eligibility
Sex/Gender
ALL
Age
18 Years to No maximum
Healthy volunteers
No
Inclusion criteria
* \>18 years, outpatients;
Exclusion criteria
* \<18 years, inpatients;
Design outcomes
Primary
| Measure | Time frame | Description |
|---|---|---|
| 25(OH)D measurement | 2015-2016 | Describe the 25(OH)D status in South-Tyrol,a region in central Europe, by a rigorously controlled, NIST 972a aligned LC-MS/MS method. |
Outcome results
None listed