What causes high Cystatin c and low CRP?

High Cystatin c and low CRP can be caused by many reasons.

If your Cystatin c is in between 0.62 mg/L and 1.03 mg/L and your CRP is in between 0.1 mg/L and 3 mg/L then you need not worry as these are the normal ranges for Cystatin c and CRP 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 Cystatin c levels include:

• Impaired kidney function
• Diabetes
• Obstructive sleep apnea
• Metabolic syndrome
• Heart disease

Normal range of Cystatin c : 0.62 - 1.03 mg/L

Ideal values of Cystatin c depending on age :

Age	Ideal Cystatin c value
<5 years	0.642
5-10 years	0.665
10-15 years	0.688
15-20 years	0.712
20-25 years	0.737
25-30 years	0.763
30-35 years	0.79
35-40 years	0.818
40-45 years	0.847
45-50 years	0.877
50-55 years	0.908
55-60 years	0.94
60-70 years	0.973
70-80 years	1.007
80-90 years	1.006
90-100 years	1.005
>100 years	1.003

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

Normal range of CRP : 0.1 - 3 mg/L

Ideal values of CRP depending on age :

Age	Ideal CRP value
<5 years	0.11388
5-10 years	0.1179
10-15 years	0.12206
15-20 years	0.12637
20-25 years	0.13083
25-30 years	0.13545
30-35 years	0.14023
35-40 years	0.14518
40-45 years	0.1503
45-50 years	0.15561
50-55 years	0.1611
55-60 years	0.16679
60-70 years	0.17268
70-80 years	0.17878
80-90 years	0.18509
90-100 years	0.19162
>100 years	0.19838

High Cystatin c and low CRP can be caused by a lot of reasons. If you take Cystatin c and CRP blood tests and the results are higher than 1.03 mg/L for Cystatin c and lower than 0.1 mg/L for CRP, 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 Cystatin c and CRP Tests Are Done :

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

Medical References

• Cleveland Clinic – Estimated Glomerular Filtration Rate (eGFR): Test & Levels
• MedlinePlus – Glomerular Filtration Rate (GFR) Test
• NIH – Serum cystatin C as a marker of renal function in detection of early acute kidney injury
• NIH – Incorporation of Cystatin C Testing in Clinical Practice: Real World Experience in Sweden