Prism then computes percent survival at each time, and plots a Kaplan-Meier survival plot (and also compares survival with the log-rank and Gehan-Wilcoxon tests). Survival tables - Survival tables are used to enter information for each subject. treated) is defined by columns.Ĭontingency tables - Contingency tables are used to tabulate the actual number of subjects (or observations) that fall into the categories defined by the rows and columns of a table. female in the example below) is defined by rows the other grouping variable (control vs. Grouped tables - The idea of two-way variables is best understood by example.

This kind of data are often fit with linear or nonlinear regression.Ĭolumn tables - Use column tables if your groups are defined by one scheme, perhaps control vs. XY tables - An XY table is a graph where every point is defined by both an X and a Y value. You can always change the format of a data table. Choosing a data table format lets Prism create a data table that fits your data and makes it easy to create the kind of graph you want and perform the appropriate analyses. The format of a Prism data table determines what kinds of graphs you can make and what kind of analyses you can perform.

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