Send us a Message

Submit Data |  Help |  Video Tutorials |  News |  Publications |  Download |  REST API |  Citing RGD |  Contact   


The Clinical Measurement Ontology (CMO), Measurement Methods Ontology (MMO), and Experimental Condition Ontology (XCO) are currently being developed at the Rat Genome Database. For more information about these vocabularies please see Shimoyama et al. Three ontologies to define phenotype measurement data. Front Genet. 2012;3:87. Epub 2012 May 28 or contact us (

Term:red blood cell distribution width-coefficient of variation
go back to main search page
Accession:CMO:0000041 term browser browse the term
Definition:The red cell distribution width (RDW) is a measurement derived from the red blood cell distribution curves generated on automated hematology analyzers and is an indicator of variation in RBC size within a blood sample. The RDW is used along with the indices (MCV, MCH, MCHC) to describe a population of RBCs. The RDW measures the deviation of the RBC width, not the actual width or size of individual cells. The RDW-CV is a calculation based on both the width of the distribution curve and the mean cell size. It is calculated by dividing the standard deviation of the mean cell size by the MCV of the red cells and multiplying by 100 to convert to a percentage.
Synonyms:exact_synonym: RDW-CV
 broad_synonym: Red cell distribution width;   red blood cell distribution width
 related_synonym: RDW
 xref: EFO:0005192;   EFO:0009188

show annotations for term's descendants           Sort by:

Related Phenotype Data for Term "red blood cell distribution width-coefficient of variation" (CMO:0000041)

Rat Strains:
Clinical Measurements:
Experimental Conditions:
Measurement Methods:

Term paths to the root
Path 1
Term Annotations click to browse term
  clinical measurement 2369
    blood measurement 443
      complete blood count and differential 15
        red blood cell morphological measurement 0
          red blood cell distribution width-coefficient of variation 0
paths to the root