Figure 2.

Specifying output attributes for patients identified by the criteria of ▶. These are the medians of the histologic tumor grade, nuclear grade, and pathology grade (all of which are ordinal data types), and the average and standard deviation of both the estrogen receptor and progesterone receptor histologic scores. Tumors are studied at multiple times during the course of follow-up and may be collected from multiple sites (e.g., primary, recurrent primary, or metastatic). Since all the output attributes are aggregates (one value per patient), they will be placed in a single output table (given the name “Breast_Ca_Path”). The field names in this output table have been specified by typing in and are slightly more mnemonic than the default field names, which are created by concatenating the aggregate name and the attribute name.