Table 5.

Definitions of the DILI Network's Diagnostic Probabilities20

Unlikely	< 25% likelihood drug was responsible. Evidence that etiologic factor other than drug caused injury
Possible	25%‐49% likelihood drug was responsible. Evidence for drug is equivocal but present.
Probable	50%‐74% likelihood drug was responsible. Preponderance of evidence linking drug to injury
Highly likely	75%‐95% likelihood drug was responsible. Evidence for drug causing injury clear and convincing but not definite
Definite	> 95% likelihood drug was responsible. Evidence beyond reasonable doubt for drug being causal