What causes high RDW SD and low Direct LDL cholesterol?

High RDW SD and low Direct LDL cholesterol can be caused by many reasons.

If your RDW SD is in between 39 fL and 46 fL and your Direct LDL cholesterol is in between 40 mg/dL and 100 mg/dL then you need not worry as these are the normal ranges for RDW SD and Direct LDL cholesterol 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 RDW SD levels include:

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

RDW SD treatment - Click to read 10 GOLDEN ARTICLES on Anemia

Normal range of RDW SD : 39 - 46 fL

Ideal values of RDW SD depending on age :

Age	Ideal RDW SD value
<5 years	39.677
5-10 years	40.366
10-15 years	41.067
15-20 years	41.78
20-25 years	42.505
25-30 years	43.243
30-35 years	43.994
35-40 years	44.758
40-45 years	45.535
45-50 years	45.521
50-55 years	45.507
55-60 years	45.493
60-70 years	45.48
70-80 years	45.467
80-90 years	45.453
90-100 years	45.439
>100 years	45.425

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

Normal range of Direct LDL cholesterol : 40 - 100 mg/dL

Ideal values of Direct LDL cholesterol depending on age :

Age	Ideal Direct LDL cholesterol value
<5 years	5.087
5-10 years	5.087
10-15 years	5.087
15-20 years	5.087
20-25 years	5.087
25-30 years	5.087
30-35 years	5.087
35-40 years	5.087
40-45 years	5.087
45-50 years	5.087
50-55 years	5.087
55-60 years	5.087
60-70 years	5.087
70-80 years	5.087
80-90 years	5.087
90-100 years	5.087
>100 years	5.087

High RDW SD and low Direct LDL cholesterol can be caused by a lot of reasons. If you take RDW SD and Direct LDL cholesterol blood tests and the results are higher than 46 fL for RDW SD and lower than 40 mg/dL for Direct LDL cholesterol, 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 SD and Direct LDL cholesterol Tests Are Done :

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

Medical References

• MedlinePlus – RDW (Red Cell Distribution Width)
• Cleveland Clinic – RDW Blood Test: What It Is, Procedure & Results
• NIH – RDW-SD is Superior to RDW-CV in Reflecting Liver Fibrosis Stage in Patients with Chronic Hepatitis B