can an interbred time series be used as a comparison group when to use a baseline data group how to use a historical data analysis how to use an interrupted time series when to use a historical baseline group in an intervention when do i use baseline data when to include a baseline group or intervention what is the difference between historical and interrupted time series how to use the paused time series when do you use a historical data set in an analysis how do you analyze readmission in hospital when to use a historical time series for a clinical trial why use historical patient groups do i need to use a historical dataset to compare a baseline when to use time series data can a hospital study use historical data as a comparison why do people use historical data when using a time series how many baseline group are included in an interrupted time series when is it safe to use a historical dataset as a comparison group how do you compare a baseline group when performing an interrupt time series?