CDC's Vitamin A Laboratory-External Quality Assessment Program Shows Little Change in Laboratory Performance for Multiple Nutritional Biomarkers over a 10-Year Period (2008-2017).

ABSTRACT:

Background

The Vitamin A Laboratory-External Quality Assessment (VITAL-EQA) program operated by the CDC provides analytical performance assessment to low-resource laboratories conducting serum vitamins A (VIA), D (VID), B-12 (B12), and folate (FOL), as well as ferritin (FER) and CRP measurements for public health studies.

Objectives

We aimed to describe the long-term performance of VITAL-EQA participants from 2008 to 2017.

Methods

Participating laboratories received 3 blinded serum samples biannually for duplicate analysis over 3 d. We assessed results (n = 6) for relative difference (%) from the CDC target value and imprecision (% CV) and conducted descriptive statistics on the aggregate 10-year and round-by-round data. Performance criteria were based on biologic var

SUBMITTER: Chaudhary-Webb M 

PROVIDER: S-EPMC11301416 | biostudies-literature | 2023 Jan

REPOSITORIES: biostudies-literature