question about definition of overall survival

[Patricia Scott]

Hello,

We are using cBioPortal data from the CoadRead  data set to analyze overall survival.

We would like to know what is the start point for time of overall survival- is it time of diagnosis or time of first treatment or some other time point.

We had assumed that the start point was time of diagnosis but then we noticed that a number of cases had a followup time of "0" and 3 of these cases are patients who died.

We would especially like to know what is meant by a followup time of '0" for a patient who has died. Does this represent someone whose colorectal cancer was diagnosed at autopsy?

Thank you for your help!

Pat Scott

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Patricia Scott

Assistant Professor

Department of Biomedical Sciences

University of Minnesota Medical School Duluth

Tel: 218-726-8361

[Anna Prizment]

Thank you for this email,

Anna

[Ino de Bruijn]

Hi Patirica and Anna,

Apologies for the delay in replying. Could you clarify which study you are referring to?

If you can share a URL where you saw this "0" follow up time I can help figure out the associated article

Best wishes,

Ino

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