This week's NephJC is discussing JAMA's provocative paper on reversible ischemic preconditioning. The methods used The Cleveland Clinic Foundation ARF score to enroll high risk patients:

I had heard of this but was not facile with it. Some quick googling pulled up this Paganini paper about the derivation and validation of the score:

Here is the score they used to predict the risk of dialysis requiring acute renal failure after cardiac surgery:

Look at the score from a creatinine of just 2.1 mg/dl!

Here is the risk from the scores:

Those confidence intervals for scores above 9 are scary wide, but it looks pretty reliable below there.

This Cleveland Clinic Foundation Score was at the center of an interesting Twitter interaction last week.

@DamianFog @NephJC @PreetiNMalani @JAMA_current Looking forward to #NephJC. Table 1 Cleveland Score median 6 IQR 6-6 - what am I missing?
— Ross Morton (@signindoc) August 5, 2015

Here is the table in question with the strange Cleveland Clinic Score highlighted:

Ross got a quick response from the editors of JAMA. Color me impressed:

@signindoc We looked into it and the #s check out; almost all pts had 6's on the measure (the minimum score to qualify for inclusion) - Eds.
— JAMA (@JAMA_current) August 6, 2015

@JAMA_current Thank you for the quick response (and also for supporting @NephJC by making the article readily available.)
— Ross Morton (@signindoc) August 6, 2015