causal adverse event probability an adverse event causal association score that represents a probability that an adverse event is caused (induced) by a medical intervention. CAE probability YH For an adverse event this is likely caused by a medical intervention, the causal adverse event (CAE) probabllity is in between 0 and 1. For a known causal adverse event, the CAE probabllity is 1. Alternatively, a CAE probability can be described as a scale that can go beyond the 0-1 range. For example, the Naranjo ADR probabililty score is a score that use scale with a wide range. adverse event causality score