What causes high RDW and low Phosphorus?

High RDW and low Phosphorus can be caused by many reasons.

If your RDW is in between 11.6 % and 14 % and your Phosphorus is in between 2.5 mg/dL and 4.5 mg/dL then you need not worry as these are the normal ranges for RDW and Phosphorus 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	11.888
5-10 years	12.183
10-15 years	12.485
15-20 years	12.795
20-25 years	13.112
25-30 years	13.437
30-35 years	13.77
35-40 years	13.761
40-45 years	13.752
45-50 years	13.743
50-55 years	13.735
55-60 years	13.727
60-70 years	13.718
70-80 years	13.709
80-90 years	13.701
90-100 years	13.693
>100 years	13.685

*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 Phosphorus : 2.5 - 4.5 mg/dL

Ideal values of Phosphorus depending on age :

Age	Ideal Phosphorus value
<5 years	2.562
5-10 years	2.626
10-15 years	2.691
15-20 years	2.758
20-25 years	2.826
25-30 years	2.896
30-35 years	2.968
35-40 years	3.042
40-45 years	3.117
45-50 years	3.194
50-55 years	3.273
55-60 years	3.354
60-70 years	3.437
70-80 years	3.522
80-90 years	3.609
90-100 years	3.699
>100 years	3.791

High RDW and low Phosphorus can be caused by a lot of reasons. If you take RDW and Phosphorus blood tests and the results are higher than 14 % for RDW and lower than 2.5 mg/dL for Phosphorus, 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 Phosphorus Tests Are Done :

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