![]() ![]() Trajen Head, Product Manager for GraphPad Prism. This video is part of the Getting Started series, presented by Dr. Use of the software is subject to the restrictions contained in the software license agreement.Explore one of the most important concepts in Prism - the data tables! Learn how to use Prism’s data tables to make it easy and intuitive to perform the right analysis and create the graphs you want to see, and ultimately save you lots of time. GraphPad Prism is a registered trademark of GraphPadSoftware, Inc. Before you start, use Prism’s View menu tomake sure that the Navigator and all optional toolbars are displayed on your computer.©2003 GraphPad Software, Inc. We encourage you to printthis article and read it at your computer, trying each step as you go. All are available fordownload as PDF files at While the directions and figures match the Windows version ofPrism 4, all examples can be applied to Apple Macintosh systems with little adaptation. Step-by-Step Examples is one of four manuals included with Prism 4. Prism can also compare two or more survival curves using the logranktest.Entering Survival DataIn the Welcome dialog, select Create a new project and Type of graph.1 Adapted from: Miller, J.R., GraphPad Prism Version 4.0 Step-by-Step Examples, GraphPad Software Inc., SanDiego CA, 2003. Survival curves show, for each time plotted on the X axis, the portion of all individuals surviving as of thattime.100Percent survival755025TreatedControl00 30 60 90 120 150Days ElapsedThe term "survival" is a bit misleading you can use survival curves to study times required to reach any welldefinedendpoint (e.g., re-occlusion of a grafted blood vessel, first metastasis, discharge from the hospital).Prism creates survival curves using the method of Kaplan and Meier and calculates the 95% confidence intervalfor fractional survival at any particular time. Version 4.0Step-by-Step ExamplesKaplan-Meier Survival Analysis 1With some experiments, the outcome is a survival time, and you want to compare the survival of two or moregroups. ![]()
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