Abstract 14529: Increased Inpatient Mortality in Atrial Flutter and Fibrillation Admissions During October to April: A Nationwide Analysis
Background: Patients admitted with diagnoses of atrial flutter and/or fibrillation (AF) are associated with significant inpatient mortality. We evaluated seasonal variation of admission in patients with primary diagnoses of AF on in-hospital mortality and total hospital charge.
Methods: This is a retrospective cohort study using the 2013 National Inpatient Sample (NIS) of adult patients hospitalized with AF as the admitting diagnoses, based on ICD-9 codes. Admissions during Cold Season: October - April (Group 1) and Warm Season: May - September (Group 2) were compared. Inpatient mortality and total hospitalization charges were evaluated. Multivariate logistic regression was used to adjust for potential cofounders including age, gender, race, hospital location, hospital region and the Charlson Comorbidity index for administrative data. STATA 13.0 was used for data analysis.
Results: 478,000 patients were identified. The mean age was 70 years and 49.9% were females. There was an inpatient mortality rate of 0.90% (4,320 patients died). After adjusting for the above factors, Group 1 had a higher inpatient mortality rate than Group 2 (odds ratio [OR] 1.20; P <0.00). There was no significant difference in total hospital charges (P = 0.33): Group 1 had an average total hospital charge of $22,000 and Group 2 had an average total hospital charge of $21,681.
Conclusions: Hospital admissions for AF during colder months (October to April) are associated with higher inpatient mortality compared to warmer months (May - September). There is no significant difference in total charges between cold season and warm season admissions.
Author Disclosures: S. Lee: None. A. Lemor: None. F. Gholitabar: None. C.A. Gongora: None. A. Dominguez: None. P.T. Kroner: None. C. Hurtado: None. D. Castaneda: None. D. Mehta: None.
- © 2016 by American Heart Association, Inc.