kaplan meier survival

  1. K

    How to do power analysis

    I want to do power analyses prior doing statistical tests on data to assess for the power it would yield. It mostly is survival data. I want to use Cox etc. What will you recommend, how to perform these?
  2. A

    Kaplan meier: hazard and 95CI

    I have conducted a time to event analysis with the kaplan-meier method and my instructor requested for HR and 95%CI of specific time points such as 1 year or 3 years. However the life table in Kaplan-Meier analysis lists me the cumulative survival for time points at which last follow-up occured...
  3. D

    Kaplan Meier and Log Rank

    Hi all, I am doing cognitive testing and the subjects have 20 possible trials to reach criterion (90% accuracy). In my spreadsheet, I have it laid out as Column1: treatment group, column2: trials to reach criterion, Column3: status(whether or not they reached criterion). Is it appropriate to...
  4. G

    Stratified log rank vs cox regression

    Hello everyone, I am performing a survival analysis to compare survival with two treatment regimen (with SPSS). With Log-rank p value is significant (p: 0,033) When stratified with a binary variable significance is lost (p:0,062) With Cox regression (backward LR method) only variable left in...
  5. L

    **Kaplan-Meier Survival - Questions about options

    Hello, I am wondering if you guys can help me out with Kaplan-Meier Survival graphs. -My research: looking at HCV RNA levels before getting surgery X and looking at their (1) overall survival (2) recurrence-free survival I divided HCV RNA into 2 groups: group 1 and 2 I have the...