What causes high RDW and low WBC?

High RDW and low WBC can be caused by many reasons.

If your RDW is in between 11.6 % and 14 % and your WBC is in between 4 thou/uL and 11 thou/uL then you need not worry as these are the normal ranges for RDW and WBC 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 : 11.6 - 14 %

Ideal values of RDW depending on age :

Age	Ideal RDW value
<5 years	11.834
5-10 years	12.073
10-15 years	12.317
15-20 years	12.566
20-25 years	12.82
25-30 years	13.079
30-35 years	13.343
35-40 years	13.613
40-45 years	13.888
45-50 years	13.883
50-55 years	13.877
55-60 years	13.871
60-70 years	13.865
70-80 years	13.859
80-90 years	13.853
90-100 years	13.848
>100 years	13.843

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

If you want your blood test report to be interpreted by RDW specialist, then you can upload your report. Our RDW 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 levels include:

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

If you want your blood test report to be interpreted by RDW specialist, you can upload your report. Our RDW 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 WBC : 4 - 11 thou/uL

Ideal values of WBC depending on age :

Age	Ideal WBC value
<5 years	4.081
5-10 years	4.163
10-15 years	4.247
15-20 years	4.333
20-25 years	4.421
25-30 years	4.51
30-35 years	4.601
35-40 years	4.694
40-45 years	4.789
45-50 years	4.886
50-55 years	4.985
55-60 years	5.086
60-70 years	5.189
70-80 years	5.294
80-90 years	5.401
90-100 years	5.51
>100 years	5.621

High RDW and low WBC can be caused by a lot of reasons. If you take RDW and WBC blood tests and the results are higher than 14 % for RDW and lower than 4 thou/uL for WBC, 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 and WBC Tests Are Done :

If your doctor wants RDW and WBC tests on you, you may need to go through these tests. During the RDW and WBC 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 and WBC Test reports by your pathologist.

Medical References

• Cleveland Clinic – RDW Blood Test: What It Is, Procedure & Results
• MedlinePlus – RDW (Red Cell Distribution Width)
• NIH – High red blood cell distribution width is closely associated with risk of carotid artery atherosclerosis