CDISC-Gloss – A breach of Clinical Trial Regulation (EU) No 536/2014 or of the version of the protocol applicable at the time of the breach, which is likely to affect to a significant degree the safety and rights of a subject or the reliability and robustness of the data generated in the clinical trial. [Article 52 of Regulation (EU) 536/2014 and Guideline for the notification of serious breaches of Regulation (EU) No 536/2014 or the clinical trial protocol] See also privacy breach.