interval survival times

  1. M

    Cox PH regression on fixed-interval (1, 2, 5-year) survival

    Dear all, I am co-author on a manuscript on a study which follows a group of patients from a certain diagnosis and studies risk factors for survival. The main author has chosen to analyze fixed-interval survival rates (1, 2 and 5-year survival) and to compare the rates between two groups of...
  2. R

    weibull for free form data (interval)

    How do i implement lifereg or generate a weibull distribution for this kind of data? Time (Mins) Cumulative % Failure 0-30 4 30-60 10 60-90 15 90-120 18 120-150 22 150-180...