What causes high RDW and low Cystatin c?

High RDW and low Cystatin c can be caused by many reasons.

If your RDW is in between 11.6 % and 14 % and your Cystatin c is in between 0.62 mg/L and 1.03 mg/L then you need not worry as these are the normal ranges for RDW and Cystatin c 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	11.9
5-10 years	12.208
10-15 years	12.524
15-20 years	12.848
20-25 years	13.181
25-30 years	13.522
30-35 years	13.872
35-40 years	13.862
40-45 years	13.853
45-50 years	13.844
50-55 years	13.835
55-60 years	13.825
60-70 years	13.816
70-80 years	13.807
80-90 years	13.798
90-100 years	13.788
>100 years	13.779

*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 Cystatin c : 0.62 - 1.03 mg/L

Ideal values of Cystatin c depending on age :

Age	Ideal Cystatin c value
<5 years	0.636
5-10 years	0.652
10-15 years	0.669
15-20 years	0.686
20-25 years	0.704
25-30 years	0.722
30-35 years	0.741
35-40 years	0.76
40-45 years	0.78
45-50 years	0.8
50-55 years	0.821
55-60 years	0.842
60-70 years	0.864
70-80 years	0.886
80-90 years	0.909
90-100 years	0.933
>100 years	0.957

High RDW and low Cystatin c can be caused by a lot of reasons. If you take RDW and Cystatin c blood tests and the results are higher than 14 % for RDW and lower than 0.62 mg/L for Cystatin c, 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 Cystatin c Tests Are Done :

If your doctor wants RDW and Cystatin c tests on you, you may need to go through these tests. During the RDW and Cystatin c 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 Cystatin c 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