While expressing EtG as a ratio to creatinine is not affected by dilution.
"while expressing EtG as a ratio to creatinine is not affected by dilution. " I am also confused about this statement. I below you stated the persons drinking incident was long enough before the test to not be detected and he shouldn't have to worry about diluting. My question is what if the drinking incident was within the time frame and would drinking a lot of water help or would the EtG still show up in a dilute specimen. A lot of places that test consider a dilute test tampering and some even consider it a positive because of that. But I have been hearing lately that even if the urine was dilute - there would still be EtG in it if you had been drinking within the time frame.