I have a medical data set that has all the following cases:

  • Right-censored
  • Left-censored
  • Interval-censored
  • Delayed-censored and
  • truncated-data.

I am trying to fit this data with CoxPH function in survival package in R. So my question, is there any consideration I have to take when I feed the data to Cox model, or just use the data as is.


1 Answer 1


The analysis used by coxph() only allows for right-censored or counting process (left truncated, right censored/event) data. From the code (in survival_3.2-7):

if (type == "mright" || type == "mcounting") 
    multi <- TRUE
else if (type != "right" && type != "counting") 
    stop(paste("Cox model doesn't support \"", type, "\" survival data", 
        sep = ""))

where "mright" and "mcounting" are right censoring or counting-process data in a multi-state model.

Ways to handle other types of censoring or truncation are discussed here.


Your Answer

By clicking “Post Your Answer”, you agree to our terms of service and acknowledge you have read our privacy policy.

Not the answer you're looking for? Browse other questions tagged or ask your own question.