What causes high INR and low WBC?

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

If your INR is in between 0.9 ratio and 1.2 ratio 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 INR and WBC respectively. But if your levels are lesser or greater than the above values, then there may be some problem in your body.

Some examples of conditions that can 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)

Normal range of INR : 0.9 - 1.2 ratio

Ideal values of INR depending on age :

Age	Ideal INR value
<5 years	0.945
5-10 years	0.992
10-15 years	1.042
15-20 years	1.094
20-25 years	1.149
25-30 years	1.146
30-35 years	1.144
35-40 years	1.141
40-45 years	1.198
45-50 years	1.195
50-55 years	1.192
55-60 years	1.189
60-70 years	1.186
70-80 years	1.183
80-90 years	1.18
90-100 years	1.177
>100 years	1.174

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

Normal range of WBC : 4 - 11 thou/uL

Ideal values of WBC depending on age :

Age	Ideal WBC value
<5 years	4.201
5-10 years	4.412
10-15 years	4.633
15-20 years	4.866
20-25 years	5.11
25-30 years	5.367
30-35 years	5.636
35-40 years	5.919
40-45 years	6.216
45-50 years	6.528
50-55 years	6.856
55-60 years	7.2
60-70 years	7.561
70-80 years	7.941
80-90 years	8.34
90-100 years	8.759
>100 years	9.199

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

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

Medical References

• MedlinePlus – Prothrombin Time Test and INR (PT/INR)
• Mayo Clinic – Prothrombin time test
• Cleveland Clinic – Prothrombin Time (PT/INR) Test