What does high RDW SD and Cystatin c mean in blood test?

High RDW SD and Cystatin c can be caused by numerous problems.

High levels of RDW SD and Cystatin c in the blood indicate a variety of health problems. If your blood RDW SD level is between 39 fL to 46 fL and the Cystatin c level is between 0.62 fL to 1.03 mg/L, then your body does not have any underlying health problems. But if RDW SD and Cystatin c levels exceed these levels, you should see a doctor immediately.

Normal RDW SD range : 39 - 46 fL

Age-wise ideal RDW SD level in blood:

Age	Ideal RDW SD value
<5 years	39.725
5-10 years	40.463
10-15 years	41.215
15-20 years	41.981
20-25 years	42.761
25-30 years	43.556
30-35 years	44.366
35-40 years	45.191
40-45 years	45.175
45-50 years	45.16
50-55 years	46
55-60 years	45.984
60-70 years	45.968
70-80 years	45.953
80-90 years	45.937
90-100 years	45.921
>100 years	45.905

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

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

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

If you want your blood test report to be interpreted by RDW SD specialist, you can upload your report. Our RDW SD 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 Cystatin c range : 0.62 - 1.03 mg/L

Age-wise ideal Cystatin c level in blood:

Age	Ideal Cystatin c value
<5 years	0.632
5-10 years	0.644
10-15 years	0.656
15-20 years	0.668
20-25 years	0.68
25-30 years	0.693
30-35 years	0.706
35-40 years	0.719
40-45 years	0.732
45-50 years	0.746
50-55 years	0.76
55-60 years	0.774
60-70 years	0.788
70-80 years	0.803
80-90 years	0.818
90-100 years	0.833
>100 years	0.848

High RDW SD and Cystatin c levels in the blood can cause a number of health problems. Your GP may recommend follow-up tests to get an important picture of your overall health and well-being. If the results are greater than 46 fL for RDW SD and more than 1.03 mg/L for Cystatin c, you may also need some follow-up tests that will help detect the underlying disease early.

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How is a blood test performed in the lab?

Depending on the symptoms you are experiencing, your doctor may order a RDW SD and Cystatin c test. In most hospitals RDW SD and Cystatin c results can be obtained within three to six hours after blood is taken. The blood is usually drawn from a vein on the inside of the elbow or the back of the hand. Drink plenty of water before your appointment. If you experience any symptoms that you are concerned about are out of the ordinary, call your doctor immediately.