Definite | Probable | Possible | Conditional | |
---|---|---|---|---|
Appropriate temporal sequence | Yes | Yes | Yes | Yes |
Known reaction to agent | Yes | Yes | Yes | No |
Improved with dechallenge1 | Yes | Yes | Yes-No | No |
Relapse on rechallenge2 | Yes | ? | ? | ? |
Event reasonably explained by clicinal state or other therapies | No | No | Yes | No |