What does high RDW and FT4 thyroid mean in blood test?

High RDW and FT4 thyroid can be caused by numerous problems.

High levels of RDW and FT4 thyroid in the blood indicate a variety of health problems. If your blood RDW level is between 11.6 % to 14 % and the FT4 thyroid level is between 0.89 % to 1.76 ng/dL, then your body does not have any underlying health problems. But if RDW and FT4 thyroid levels exceed these levels, you should see a doctor immediately.

Normal RDW range : 11.6 - 14 %

Age-wise ideal RDW level in blood:

Age	Ideal RDW value
<5 years	12.238
5-10 years	12.911
10-15 years	13.621
15-20 years	13.58
20-25 years	13.539
25-30 years	13.498
30-35 years	13.457
35-40 years	13.416
40-45 years	13.376
45-50 years	13.336
50-55 years	13.295
55-60 years	13.255
60-70 years	13.984
70-80 years	13.942
80-90 years	13.9
90-100 years	13.858
>100 years	13.816

*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 FT4 thyroid range : 0.89 - 1.76 ng/dL

Age-wise ideal FT4 thyroid level in blood:

Age	Ideal FT4 thyroid value
<5 years	0.93895
5-10 years	0.99059
10-15 years	1.04507
15-20 years	1.10255
20-25 years	1.16319
25-30 years	1.22717
30-35 years	1.29466
35-40 years	1.36587
40-45 years	1.44099
45-50 years	1.52024
50-55 years	1.60385
55-60 years	1.69206
60-70 years	1.68694
70-80 years	1.68184
80-90 years	1.67675
90-100 years	1.67168
>100 years	1.66662

High RDW and FT4 thyroid 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 14 % for RDW and more than 1.76 ng/dL for FT4 thyroid, 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 and FT4 thyroid test. In most hospitals RDW and FT4 thyroid 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.