Confidence Intervals in Kaplan Meier Tool
Submitted by santam chakraborty
Link to original bug (#558582)
Description
The recent inclusion of the Kaplan Meier plugin in the Gnumeric 1.93 release is a big step forward in the routine use of Gnumeric in the medical proffession looking for an easy way to do Survival Analysis. Here are some suggestions to improve the Analysis.
- Include other numbers that can be used as censors in addition to 0 and 1.
- Comparison of two Kaplan Meier curves - example senario - I want to analyse the difference in the survival between the two groups of patients one treated with medicine A and one treated with Medicine B and I want to know any significant differences between the two. Using the log rank test we can find out the difference in the mean survival estimates and the statistical significance. The wikipedia article which links to log rank test is here : http://en.wikipedia.org/wiki/Logrank_test
- Another feature I would like to see is the mean and median survivals with the 95% confidence intervals. Here is an article that describes the KM test procedure in SPSS in details http://faculty.chass.ncsu.edu/garson/PA765/kaplanmeier.htm
Version: 1.9.x