This simple categoricalvariable provided superior prognostic information to the TNM stage.
2
While the improvement associated with a categoricalvariable was substantial in estimating breast dose, the improvement was minor for other organs.
3
The Cox proportional hazards model demonstrated no association between number of biopsy sessions as a continuous or categoricalvariable and biochemical recurrence.
4
IFR was computed as a categoricalvariable for low or high fertility depending upon whether the IFR was over or under 45.
5
PSA density was examined as a continuous and a categoricalvariable using cutoffs to separate patients into groups at different risks for PSA failure.