“…Similar to previous studies, 3,6,7 for our primary analysis, the physician continuity classification was locked-in at the end of the first 14 days (or at the time of an outcome event if it occurred within the first 14 days) and did not take into account further outpatient visits during the remainder of the observation period for each patient. In a sensitivity analysis, we defined follow-up on the basis of the first 7 days after the index HF visit, again using time-varying covariate analyses.…”