What causes high INR and low RDW SD?

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

If your INR is in between 0.9 ratio and 1.2 ratio and your RDW SD is in between 39 fL and 46 fL then you need not worry as these are the normal ranges for INR 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 INR : 0.9 - 1.2 ratio

Ideal values of INR depending on age :

Age	Ideal INR value
<5 years	0.951
5-10 years	1.005
10-15 years	1.062
15-20 years	1.123
20-25 years	1.187
25-30 years	1.183
30-35 years	1.179
35-40 years	1.175
40-45 years	1.171
45-50 years	1.167
50-55 years	1.164
55-60 years	1.16
60-70 years	1.156
70-80 years	1.152
80-90 years	1.149
90-100 years	1.145
>100 years	1.141

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

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

• Liver disease
• Vitamin K abnormality
• Decreased or defective factor I (fibrinogen), II (prothrombin), V or X
• Hemophilia A and hemophilia B
• Autoantibody against a specific factor (e.g., factor VIII)

If you want your blood test report to be interpreted by INR specialist, you can upload your report. Our INR 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	41.223
5-10 years	43.573
10-15 years	43.432
15-20 years	45.908
20-25 years	45.759
25-30 years	45.61
30-35 years	45.462
35-40 years	45.314
40-45 years	45.167
45-50 years	45.021
50-55 years	44.875
55-60 years	44.729
60-70 years	44.584
70-80 years	44.439
80-90 years	44.295
90-100 years	44.151
>100 years	44.008

High INR and low RDW SD can be caused by a lot of reasons. If you take INR and RDW SD blood tests and the results are higher than 1.2 ratio for INR 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 INR and RDW SD Tests Are Done :

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