What Is a RDW Blood Test? An RDW blood test – also known as a red blood cell distribution width blood test – is a measure of the difference in your red blood cells’ size and volume.

Medically reviewed by Gagandeep Brar, MD The red cell distribution width (RDW) blood test measures differences in the volume ...

The red cell distribution width (RDW) blood test measures how equal your red blood cells are in size. One of several tests included in a complete blood count (CBC), RDW is measured as a percentage.

Shaped relationship between the red cell distribution width to albumin ratio and erectile dysfunction: a cross-sectional ...