Dear all,
I am planning a survival analysis on a single-record multiple failure dataset. Each subject has one entry with multiple independent variables as well as three different potential failure events. Only one of the events is terminal (fail3 - death) but the other two can occur independently and in any order (see below). Many subject may have had none or more of the three events up to a censoring time (checktime).
I would like to consider all the events in a multiple-failure analysis rather than only the first event. I am not entirely clear on how to stset the dataset - recommendations would be greatly appreciated.
Many thanks,
Nikos
Example table:
ID - subject ID
IV1/2 independent variables
Fail1/2/3 - three different failure modes and corresponding times (where appropriate).
checktime - last time info is available on subject outcome
All times are already in days from time of entry with no left-censoring
I am planning a survival analysis on a single-record multiple failure dataset. Each subject has one entry with multiple independent variables as well as three different potential failure events. Only one of the events is terminal (fail3 - death) but the other two can occur independently and in any order (see below). Many subject may have had none or more of the three events up to a censoring time (checktime).
I would like to consider all the events in a multiple-failure analysis rather than only the first event. I am not entirely clear on how to stset the dataset - recommendations would be greatly appreciated.
Many thanks,
Nikos
Example table:
ID - subject ID
IV1/2 independent variables
Fail1/2/3 - three different failure modes and corresponding times (where appropriate).
checktime - last time info is available on subject outcome
All times are already in days from time of entry with no left-censoring
| ID | IV1 | IV2 | Fail1 | Fail1time | Fail2 | Fail2time | Fail3 | Fail3time | Checktime |
| 1 | 33 | 32 | 0 | . | 1 | 15 | 0 | . | 1125 |
| 2 | 22 | 43 | 0 | . | 0 | . | 0 | . | 800 |
| 3 | 14 | 23 | 1 | 34 | 0 | . | 1 | 155 | 155 |
| 4 | 55 | 34 | 0 | . | 1 | 140 | 0 | . | 998 |
Code:
* Example generated by -dataex-. To install: ssc install dataex clear input byte(id iv1 iv2 fail1 fail1time fail2) int fail2time byte fail3 int(fail3time checktime) 1 33 32 0 . 1 15 0 . 1125 2 22 43 0 . 0 . 0 . 800 3 14 23 1 34 0 . 1 155 155 4 55 34 0 . 1 140 0 . 998 end