Yes, Serum
Creatinine levels can slightly vary between labs, and this is completely normal.
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Why Your Results Vary (1.10 vs 1.18 mg/dL):
1. Different Laboratory Methods:
Labs may use slightly different testing machines, reagents, or calibration standards.
Some use the Jaffe method, others use enzymatic methods—these can show slight differences.
2. Reference Ranges Vary Slightly:
Each lab sets its own "normal range" based on the population it serves and the equipment used.
That’s why one lab says 0.6–1.30 mg/dL and another says up to 1.4 mg/dL.
3. Biological Factors:
Mild differences can even occur due to hydration, muscle mass, time of the day, or food intake.
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Is This a Concern?
No, your values (1.10 and 1.18) are both within normal range of both labs.
A variation of 0.08 mg/dL is clinically insignificant and very common between labs.
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What You Should Do:
For trend monitoring, try to stick to the same lab if possible.
Creatinine is just one marker — if you’re monitoring
kidney function, ask your doctor to also check:
eGFR
Urine
albumin-to-creatinine ratio (ACR)
Blood pressure and
electrolytesNext Steps
mentioned above
Health Tips
mentioned above