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25-OH Vitamin D

The main circulating form of vitamin D and the standard measure of vitamin D status.

For everyone & professionals

Indicators

25-OH Vitamin D

The main circulating vitamin D metabolite — the standard measure of vitamin D status.

Article

A standardized single-tube 17-color spectral flow cytometry workflow for integrated immunophenotyping of human PBMCs and mixed co-culture systems.

Research record from Front Immunol, 2026-05-08. PMID 42183289.

Article

Analytical standardization and inter-platform harmonization of immunoassay-based biomarkers in atopic dermatitis: Challenges and a roadmap for clinical laboratory implementation.

Research record from Clin Chim Acta, 2026-09-28. PMID 42805450.

Article

Analytical validation of an IFCC-endorsed mass spectrometry-based semi-automated reference measurement procedure for global standardization of serum apolipoprotein(a).

Research record from Clin Chem Lab Med, 2026-06-10. PMID 42287143.

Tests

Bethesda Assay

An assay designed to standardize measurement of serum inhibitors of blood clotting in a factor VIII neutralization assay.

For professionals

Glossary Term

A storage facility of biospecimens that includes tissue samples, fluids, and molecular derivatives such as DNA, RNA, and proteins. The biorepository has stringent guidelines regarding the standardized collection, handling, storage, and documentation of biological specimens.

Pcr Terms

Glossary Term

Calibration

The act of checking or adjusting (by comparison with a standard) the accuracy of a measuring instrument.

Performance Metrics

Glossary Term

Calibrator Device

An instrument designed to measure the size of an opening or one used to increase the diameter of an opening; can also refer to a standard or reference material used to set the operating parameters of an instrument.

Performance Metrics

Article

Clinical Performance of the Elecsys HCV Duo Immunoassay Compared with a Standard-of-Care Algorithm Using Alinity Anti-HCV Screening and HCV RNA Confirmation.

Research record from Diagnostics (Basel), 2026-10-07. PMID 42882394.

Article

Clinical utility of CSF metagenomic next-generation sequencing in suspected CNS infection: performance against a composite reference standard and read-count stratification.

Research record from Front Cell Infect Microbiol, 2026-07-28. PMID 42582033.

Glossary Term

Coefficient of Variance

The ratio of standard deviation to mean, expressed as a percentage or fraction.

Performance Metrics

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25-OH Vitamin D

25-OH Vitamin D

A standardized single-tube 17-color spectral flow cytometry workflow for integrated immunophenotyping of human PBMCs and mixed co-culture systems.

Analytical standardization and inter-platform harmonization of immunoassay-based biomarkers in atopic dermatitis: Challenges and a roadmap for clinical laboratory implementation.

Analytical validation of an IFCC-endorsed mass spectrometry-based semi-automated reference measurement procedure for global standardization of serum apolipoprotein(a).

Bethesda Assay

Biorepository

Calibration

Calibrator Device

Clinical Performance of the Elecsys HCV Duo Immunoassay Compared with a Standard-of-Care Algorithm Using Alinity Anti-HCV Screening and HCV RNA Confirmation.

Clinical utility of CSF metagenomic next-generation sequencing in suspected CNS infection: performance against a composite reference standard and read-count stratification.

Coefficient of Variance