Variables of SimData

Gabriel Potvin

January 09, 2026

Variables of SimData

The variables in SimData are created during data generation and depend on the current simulation. It stores outputs produced by integration points such as response, enrollment, dropout, or randomization. Any optional custom outputs defined at an endpoint are also included as columns in this data frame. Common and useful variables include:

Variable	Description	Notes
Response	Vector of length equal to the number of subjects, containing the generated responses for all subjects.	Not available for Endpoint Type = Time-to-Event or Continuous with Repeated Measures. See the Output section of Integration Point: Response - Binary Outcome, Integration Point: Response - Continuous Outcome, or Integration Point: Response - Dual Endpoints for more information.
Response, Response1, …, ResponseNumVisit	Vectors of length equal to the number of subjects, containing the generated responses for all subjects for each visit.	Only available for Endpoint Type = Continuous with Repeated Measures. See the Output section of Integration Point: Response - Continuous Outcome with Repeated Measures for more information.
SurvivalTime	Vector of length equal to the number of subjects, containing the time to response values for all subjects for each visit.	Only available for Endpoint Type = Time-to-Event. See the Output section of Integration Point: Response - Time-to-Event for more information.
ArrivalTime	Vector of length equal to the number of subjects, containing the arrival times in the study for all subjects.	See the Output section of Integration Point: Enrollment for more information.
TreatmentID	Vector of length equal to the number of subjects, containing the allocation indices for all subjects: – 0: Control arm. – 1: First experimental arm. – etc.	See the Output section of Integration Point: Randomization for more information.
CensorInd or CensorIndOrg	Vector of length equal to the number of subjects, containing the generated censor indicator values for all subjects: – 0: Dropout. – 1: Completer.	Only available for Endpoint Type = Continuous or Binary. See the Output section of Integration Point: Dropout - Continuous Outcome or Integration Point: Dropout - Binary Outcome for more information.
DropOutTime	Vector of length equal to the number of subjects, containing the generated dropout times for all subjects.	Only available for Endpoint Type = Time-to-Event, Continuous with Repeated Measures or Vaccine Efficacy (Binary), or Dual. See the Output section of Integration Point: Dropout - Time-to-Event Outcome, Integration Point: Dropout - Continuous Outcome with Repeated Measures, Integration Point: Dropout - Binary Outcome, or Integration Point: Dropout - Dual Endpoints for more information.
DropoutVisitID	Vector of length equal to the number of subjects, containing the visit ID after which each subject drops out.	Only available for Endpoint Type = Continuous with Repeated Measures. See the Output section of Integration Point: Dropout - Continuous Outcome with Repeated Measures for more information.
CensorInd1, CensorInd2, …, CensorIndNumVisit	Vector of length equal to the number of subjects, containing the generated censor indicator values for all subjects for each visit: – 0: Dropout. – 1: Completer.	Only available for Endpoint Type = Continuous with Repeated Measures. See the Output section of Integration Point: Dropout - Continuous Outcome with Repeated Measures for more information.

For Study objective = Two Arm Confirmatory - Multiple Endpoints

For Multiple Endpoints, the variables of SimData are different.

Variable	Description	Notes
SimID	Vector of length equal to the number of subjects, indicating the simulation ID.
PatId	Vector of length equal to the number of subjects, containing the patient ID identifying a unique patient in a given simulation.
ArrivalTime	Vector of length equal to the number of subjects, containing the arrival times in the study for all subjects.	See the Output section of Integration Point: Enrollment for more information.
TreatmentID	Vector of length equal to the number of subjects, containing the allocation indices for all subjects: – 0: Control arm. – 1: First experimental arm. – etc.	See the Output section of Integration Point: Randomization for more information.
TResponse.EPNAME	Vector of length equal to the number of subjects, containing the generated responses for a specific endpoint.	EPNAME is the endpoint name specified in East Horizon. Endpoint names can also be accessed using DesignParam$EndpointName.
CensorID.EPNAME	Vector of length equal to the number of subjects, containing the generated censor indicator values for a specific endpoint: – 0: Dropout. – 1: Completer	EPNAME is the endpoint name specified in East Horizon. Endpoint names can also be accessed using DesignParam$EndpointName.
Response.EPNAME	Vector of length equal to the number of subjects, containing the generated responses for a specific endpoint after adjusting for endpoint and dropout rules.	EPNAME is the endpoint name specified in East Horizon. Endpoint names can also be accessed using DesignParam$EndpointName.
CalRespT.EPNAME	Vector of length equal to the number of subjects, containing the generated response times on calendar scale for a specific endpoint. Equivalent to Response + ArrivalTime.	EPNAME is the endpoint name specified in East Horizon. Endpoint names can also be accessed using DesignParam$EndpointName.
DropoutID.EPNAME	Vector of length equal to the number of subjects, containing whether each patient dropped out before responding for a specific endpoint: – 0: Dropout. – 1: Completer	EPNAME is the endpoint name specified in East Horizon. Endpoint names can also be accessed using DesignParam$EndpointName.