Meanings of categorical measurement scale in English

This simple categorical variable provided superior prognostic information to the TNM stage.

While the improvement associated with a categorical variable was substantial in estimating breast dose, the improvement was minor for other organs.

The Cox proportional hazards model demonstrated no association between number of biopsy sessions as a continuous or categorical variable and biochemical recurrence.

IFR was computed as a categorical variable for low or high fertility depending upon whether the IFR was over or under 45.

PSA density was examined as a continuous and a categorical variable using cutoffs to separate patients into groups at different risks for PSA failure.