| Old MedDRA Version | The version of the MedDRA dictionary in which the previous classification was included. | 
| Old Classification | The classification hierarchy of the term associated with the submission master record, from a previous version of the MedDRA dictionary. | 
| New Classification | The classification hierarchy of the term associated with the submission master record, from the newest version of the MedDRA dictionary, showing the changes to the term in red. | 
| New MedDRA Version | The version of the MedDRA dictionary in which the new classification is included. | 
| Impacted Data | A comma-separated list of submission master records that include this classification as an indication. You can click the name to open that submission master record. |