Abstract
Background: The “July effect” is a well-described phenomenon in academic medicine, relating to the annual influx of new trainees. We examined whether the “July effect” impacts inpatient outcomes of admissions for heart failure (HF). Methods: Between 2012 and 2014, we included adult patients (≥18 years) with a primary diagnosis of HF, defined using ICD-9 codes, from the National Inpatient Sample. We excluded non-teaching hospitals. Primary endpoint was in-hospital mortality. Secondary endpoints included hospital length of stay (LOS) and total cost adjusted for inflation. Logistic regression and adjusted odds ratio (OR) were used to adjust for confounders. Based on academic calendar, we classified admissions into 4 quarters (Q1-4). Q1 and Q4 were designated to assess the effect of novice (July effect) vs. seasoned trainees, respectively. Results: We identified 699,675 HF admissions during Q1 and Q4 over the study period. Mean age was 71 years and 48% were females. There were 20,270 in-hospital deaths (Q1 9,695 vs. Q4 10,575). After adjusting for confounders, there was no mortality difference between Q1 and Q4 admissions; adjusted OR 0.96, p = 0.23 (Figure). Similarly, there was no difference in hospital LOS or total cost; 5.8 vs. 5.8 days, p = 0.66 and $13,755 vs. $13,586, p = 0.46, in Q1 and Q4, respectively. Conclusion: In the largest study to date, there was no evidence of a “July effect” on inpatient HF outcomes. This may be credited to the well-defined guidelines which facilitate safe patient care in these patients.
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