12. A. Cox regression analysis . . .{one correct choice} a Is used to analyse survival data when individuals in the study are followed for varying lengths of time. j Can only be used when there are censored data I: Always assumes that the relative hazard for a particular variable is constant at all times I Uses the logrank statistic to compare two survival curves n1 Relies on the assumption that the explanatory variables loovariates] in the model are Normally distributed. lItalvren from b.2101