c1-immortal-time-traveler {ctfepi}sealed case file
Immortal Time Traveler
Case C1, Outside the TrialCausal Inferencescene 3hard400 pts
Case
The Saltmarsh records hold 40,000 heart failure patients. You design the target trial before touching the data.
What this scene will ask
With the correct time zero the hazard ratio flips.
Planned flag: number of patients whose person time was misclassified; misclassified person years, 1 dp; corrected HR, 2 dp.
Status
[#] Sealed. This scene opens when it is written and passes review. Nothing on CTFEpi expires, so there is no rush.