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3019897
Red Cell Distribution Width (RDW) is a measurement of anisocytosis (red blood cells of unequal size). [1] The RDW test is used to help diagnose types of anemia and other medical conditions including: [2]
- thalassemias, which are inherited blood disorders that can cause severe anemia
- diabetes mellitus
- heart disease
- liver disease
- cancer
The red cell distribution width - standard deviation (RDW-SD) is what's typically measured in FEMTOLITERS. A normal RDW-SD range for adults is 40.0 - 55.0 fL. [3]
In the OMOP vocabulary 3019897 is a Standard Concept that represents the measurement ERYTHROCYTE DISTRIBUTION WIDTH [RATIO] BY AUTOMATED COUNT
The recommended low and high values for each unit associated with 3019897 are below. These are not meant to be normal values. Rather, these are meant to be biologically plausible values. For example, it would be implausible to see a patient with a weight of 0 kg though a person could be 2.5 kg.
In the OMOP vocabulary 8583 is a Standard Concept that represents the unit FEMTOLITER
0.001
75.0
The range 0.001-75.0 was chosen based on values seen in real world data. The plausible high value for this concept was previously set to 54.0 which accounts for values found with the normal expected range. There are a number of outliers seen in this measurement likely due to source data entry mis-types and/or meaurement mis-labeling. In the data reviewed more than 99% of data with this standard unit concept should be accounted for with this new range which we believe is a truer representation of plausability.