I'm Better Than You're at EOS, I've Heard.

Eosinophils are terrible for diagnosing interstitial nephritis. The relationship between a creatinine and GFR, glomerular filtration rate is inverse and exponential. Small changes at the beginning are large. Women comes in with pretty normal creatinine but they have a bump from 1 to 1.3. That's a really big deal. And that's often missed. Often.