MDCalc

Acute Interstitial Nephritis (AIN) Risk Calculator

Identifies the likelihood of acute interstitial nephritis in at-risk patients.

Should only be used for patients in whom a kidney biopsy is being considered.

Urine dipstick protein

Result:

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Advice
  • The original study did not define specific probability cutoffs but suggested:
    • Low probability: AIN is unlikely; evaluate for alternative diagnoses.
    • Intermediate or high probability: AIN is possible; further evaluation with a kidney biopsy is warranted.
  • This tool should not be the sole determinant for pursuing a biopsy. Clinical judgment remains crucial.