I was wondering if anyone knows if being unwell with a bad cold or the flu can affect your EGRF. At the end of last year my egrf was 54, I had it repeated three months after and I made sure I drank lots of fluids before the test and it came back above 60. Annoyingly the blood test won't tell you what your measurement is if above 60. Anyway I had one done last week that I didn't expect and it had gone down to 52. Is this likely to because I had been unwell for 10 days before with a heavy cold, or because I affected my measurement by drinking lots of fluids in the days running up to the test. I have another test in three weeks time.
Thank you for your help.