What causes high RDW CV and low RDW SD?

High RDW CV and low RDW SD can be caused by many reasons.

If your RDW CV is in between 11.6 % and 14 % and your RDW SD is in between 39 fL and 46 fL then you need not worry as these are the normal ranges for RDW CV and RDW SD respectively. But if your levels are lesser or greater than the above values, then there may be some problem in your body.

Normal range of RDW CV : 11.6 - 14 %

Ideal values of RDW CV depending on age :

Age	Ideal RDW CV value
<5 years	11.805
5-10 years	12.014
10-15 years	12.227
15-20 years	12.443
20-25 years	12.663
25-30 years	12.887
30-35 years	13.115
35-40 years	13.347
40-45 years	13.583
45-50 years	13.823
50-55 years	13.819
55-60 years	13.815
60-70 years	13.811
70-80 years	13.806
80-90 years	13.801
90-100 years	13.796
>100 years	13.791

*Ideal values are calculated based on our database of patient records

If you want your blood test report to be interpreted by RDW CV specialist, then you can upload your report. Our RDW CV expert will provide you with the most accurate interpretation of your blood test results and treatment within 12 hours. Upload blood test report now

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Some examples of conditions that increase or decrease RDW CV levels include:

• An iron or vitamin deficiency
• Crohn's disease
• Chronic liver disease
• Thalassemia, an inherited blood disorder
• Heart disease

If you want your blood test report to be interpreted by RDW CV specialist, you can upload your report. Our RDW CV expert will provide you with the most accurate interpretation of your blood test results and treatment within 12 hours. Upload blood test report now

Normal range of RDW SD : 39 - 46 fL

Ideal values of RDW SD depending on age :

Age	Ideal RDW SD value
<5 years	39.69
5-10 years	40.393
10-15 years	41.108
15-20 years	41.836
20-25 years	42.576
25-30 years	43.33
30-35 years	44.097
35-40 years	44.878
40-45 years	45.672
45-50 years	45.657
50-55 years	45.643
55-60 years	45.629
60-70 years	45.615
70-80 years	45.6
80-90 years	45.586
90-100 years	45.572
>100 years	45.558

High RDW CV and low RDW SD can be caused by a lot of reasons. If you take RDW CV and RDW SD blood tests and the results are higher than 14 % for RDW CV and lower than 39 fL for RDW SD, your physician may recommend more tests to figure out the problem. You might also get these tests if your physician thinks you have some other disease.

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How the RDW CV and RDW SD Tests Are Done :

If your doctor wants RDW CV and RDW SD tests on you, you may need to go through these tests. During the RDW CV and RDW SD blood tests, a pathologist will put a needle into your veins and take out a small quantity of blood. A pathologist is a physician in the medical field who thoroughly studies the causes and effects of disease. Within a few hours you will get your RDW CV and RDW SD Test reports by your pathologist.