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

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

High levels of RDW SD and RDW in the blood indicate a variety of health problems. If your blood RDW SD level is between 39 fL to 46 fL and the RDW level is between 11.6 fL to 14 %, then your body does not have any underlying health problems. But if RDW SD and RDW 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	39.705
5-10 years	40.423
10-15 years	41.154
15-20 years	41.898
20-25 years	42.656
25-30 years	43.427
30-35 years	44.212
35-40 years	45.011
40-45 years	45.825
45-50 years	45.81
50-55 years	45.795
55-60 years	45.78
60-70 years	45.765
70-80 years	45.75
80-90 years	45.735
90-100 years	45.72
>100 years	45.705

*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 RDW range : 11.6 - 14 %

Age-wise ideal RDW level in blood:

Age	Ideal RDW value
<5 years	11.81
5-10 years	12.024
10-15 years	12.241
15-20 years	12.462
20-25 years	12.687
25-30 years	12.916
30-35 years	13.15
35-40 years	13.388
40-45 years	13.63
45-50 years	13.876
50-55 years	13.872
55-60 years	13.868
60-70 years	13.864
70-80 years	13.86
80-90 years	13.856
90-100 years	13.852
>100 years	13.847

High RDW SD and RDW 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 14 % for RDW, 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 RDW test. In most hospitals RDW SD and RDW 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.