Hello, I hope everything is going well. I am looking at some past metadata sheets that my collaborator has given me and there are extra variables provided. I looked at the most recent clinical codebook dictionary found here: https://www.synapse.org/#!Synapse:syn3191087 and I cannot find definitions for the following variables: ``` anye4 ``` ``` Delta_Time ``` ``` niareagansc ``` ``` dlbdx ``` ``` amyloid ``` ``` psychdstrss_3 ``` Would it be possible to provide the definitions for the terms above? If so, then that would be super helpful as I go through my analysis. Thank you and have a nice day, Phoebe

Created by Phoebe Valdes prvaldes
Hi Phoebe, We only have a limited set of the full ROSMAP data, and these variables are not within our dataset. However, while looking through the [RADC](https://www.radc.rush.edu/docs/var/variables.htm) variables, I can derive some of them. The buttons below will provide a link to the full definition. ${buttonlink?text=niareagansc&url=https://www%2Eradc%2Erush%2Eedu/docs/var/detail%2Ehtm%3Fcategory%3DPathology%26subcategory%3DAlzheimer%2527s%2Bdisease%26variable%3Dniareagansc&align=None} ${buttonlink?text=amyloid&url=https://www%2Eradc%2Erush%2Eedu/docs/var/detail%2Ehtm%3Fcategory%3DPathology%26subcategory%3DBeta%2DAmyloid%26variable%3Damyloid&align=None} ${buttonlink?text=dlbdx&url=https://www%2Eradc%2Erush%2Eedu/docs/var/detail%2Ehtm%3Fcategory%3DPathology%26subcategory%3DLewy%2Bbody%252fPD%26variable%3Ddlbdx&align=None} My guess for 'anye4' is presence or absence of the APOE4 allele. I am not sure exactly what Delta_Time and psychdstress_3 indicate, and in fact they may be variables that your collaborator created from other variables in RADC. I would encourage you to reach out to your collaborator for information. I hope that helps! Best, Laura

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