I need to help about left truncation survival analysis with the programme of R.
Is there any supportive document,video or anything?
If possible would you please show me example and result for this topic?
I have heard of someone who had a problem with left censored data, but all the software were for right censored data. So he just multiplied the data with -1. That turned the left censored to right censored. Can you do the same for truncated data?
Left censored data often happens when values are "below the detection limit". Search for: "truncaion below the detection limit".