There are multiple definitions:

1. Responder Index For Lupus Erythematosus(English)

   • developed to determine response criteria for SLE and to define their MCID
   • SLAM-R, SELENA-SLEDAI, ACR, MCID, SLE, BILAG, SLEDAI, ECLAM
   • Autoimmunity, Guidelines
   • https://doi.org…3075-015-0906-9

2. Risk, Injury, Failure, Loss, and End-stage kidney(English)

   • a classification that defines three grades of increasing severity of acute kidney injury – risk (class R), injury (class I) and failure (class F) – and two outcome classes (Loss and End-stage kidney disease
   • pRIFLE, AKI, ICU
   • Nephrology, Classification, Emergency medicine
   • https://doi.org/10.1186/cc4915