Fig. 4
From: Dynamic updating of clinical survival prediction models in a changing environment
New cohorts simulation results for the new treatment scenario. The left graphic shows the average C-index for each updating method across the 600 simulated datasets at each of the 5 prediction times for the scenario where a new treatment was introduced at the beginning of Q2. On the right, the average calibration intercept is shown for the same scenario. Results for ‘Recal once’ and ‘Refit once’ strategies are ordered by update time with the earliest time on the left