Survival Score provides both the estimated relative risk and restricted mean survival time based on a Cox proportional hazards model. The estimated risk (returned in the output field "Risk") provides the expected probability the unit described in a record will not survive to the next time period relative to a unit that possessed the mean characteristics in the sample used to estimate the model. The restricted mean survival time (returned in the output field "RMST_<time periods>") is the mean number of time periods that a unit described in a record will survive over a user specified (longer) time period (which is the value of <time periods> in the field name, which is give as a reference). For instance, if the time measure is in days, and the specified time period is a 365 days (a year) then the returned value will be between 0 and 365, with a value of, say, 274 indicating that the expected number of days the entity described by record will survive in the 365 day period is 274 days.
