Strange eGFR Reading?

[Saltyy]

Last month, my blood test showed a Creatinine level of 1.64 and an eGRF of 45. A follow up test 3 weeks later showed a Creatinine level of 1.60 and an eGFR of 32. Yes, I was a little dehydrated for the 2nd test, but these results make no sense to me. I then used several online calculators and keep getting a result in the mid 40's. Any advice? This is very stressful. Jim

[Bassetmommer]

GFR is just a picture of the time you had the labs done. Very possibly being dehydrated will impact the numbers. Don't sweat it unless things keep going down. I worry more about the creatinine, which went down on your lab. I had one blood draw and for some reason they did two separate tests and they were different. Same draw.

[Darlenia in reply to Bassetmommer]

Generally speaking, the lower the creatinine number the better. It's an inverse relationship with GFR and creatinine. High GFR is good, low creatinine is good. GFR is a type of soft data since it includes variables like age (birthdays can make a difference) and sex; creatinine is hard data which shows exactly how much waste product is in one's blood right now at this specific time. Nephs pay a lot of attention to creatinine figures. Saltyy's is trending down ever so slightly. So that's nice.