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. Author manuscript; available in PMC: 2018 Dec 10.
Published in final edited form as: Stata J. 2017 Mar;17(1):181–207.

1977 total observations
0 exclusions

1977 observations remaining, representing
1977 subjects
1141 failures in single-failure-per-subject data
3796.057 total analysis time at risk and under observation
at risk from t = 0
earliest observed entry t = 0
last observed exit t = 8.454483
. stcrprep, events(status) keep(score) trans(1 2) wtstpm2 censdf(4) every(0.25)