I have a different answer.
Any serum creatinine over the upper limit of normal can represent 50% or more loss of renal function.
You should not rely on any home test; nor are urine tests accurate.
If you have serum readings that have gone up, you need to have a lab test.
In fact, in many labs, over 1.1 is high, and this represents a problem
Early damage can be detected with a microalbumin test of the urine in many cases.
I see no reason to base anything on a spot urine test.
And, to re iterate, ANY serum creatinine high on a lab test over high normal
1.1 in most cases, is a problem.
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