Vitamin D Status Measurement Protocol

Blood samples were processed and refrigerated. The samples were transported on the day of the survey to the designated central laboratory of Neodin Medical Institute (NMI), a laboratory certified by the Korean Ministry of Health and Welfare in Seoul, Korea. Blood samples were analyzed within 24 hours after transport. Serum 25(OH)D levels were measured by radioimmunoassay methods with a WIZARD 1470 Gamma Counter (PerkinElmer, Finland) and a Gamma Counter (Hewlett Packard, USA) in the 4th and 5th KNHANES, respectively [19 (link)]. Vitamin D deficiency was defined as a level of <20 ng/ml as per the recent guidelines proposed by the Institute of Medicine (IOM).

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Oh M.G., Han M.A., Park J., Ryu S.Y, & Choi S.W. (2015). The Prevalence of Vitamin D Deficiency among Cancer Survivors in a Nationwide Survey of the Korean Population. PLoS ONE, 10(6), e0129901.

Publication 2015

WIZARD 1470 Gamma Counter Gamma Counter

Blood Gamma Korean Radioimmunoassay methods Serum Vitamin d deficiency

Corresponding Organization :

Other organizations : Asan Foundation, Chosun University

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Variable analysis

independent variables

None explicitly mentioned

dependent variables

Serum 25(OH)D levels

control variables

Blood samples were processed and refrigerated
Blood samples were analyzed within 24 hours after transport
Serum 25(OH)D levels were measured by radioimmunoassay methods with a WIZARD 1470 Gamma Counter (PerkinElmer, Finland) and a Gamma Counter (Hewlett Packard, USA) in the 4th and 5th KNHANES, respectively
Vitamin D deficiency was defined as a level of <20 ng/ml as per the recent guidelines proposed by the Institute of Medicine (IOM)

positive controls

None explicitly mentioned

negative controls

None explicitly mentioned

Annotations

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