Seasonality and Readmission after Heart Failure, Myocardial Infarction, and Pneumonia.

摘要: Objective To investigate whether hospital readmission after admission for heart failure (HF), myocardial infarction (MI), and pneumonia varies by season. Data Sources All patients in 2005–2009 Healthcare Cost Utilization Project State Inpatient Databases New York California hospitalized HF, MI, or pneumonia. Study Design The relationship between discharge season unplanned within 30 days was evaluated using multivariate modified Poisson regression. Principal Findings Cohorts included 869,512 with 448,945 813,593 pneumonia. While admissions varied widely season, rates only ranged from 25.0 percent (spring) to 25.6 (winter) HF (p > .05), 18.9 (summer) 20.0 MI (p < .001), 19.4 20.3 (p < .001). In adjusted models, York, there lower spring fall (RR: 0.98, 95% CI: 0.96–0.99 both) higher 1.04, 1.01–1.07) MI. California, winter 0.95, 0.93–0.96 RR: 0.96, 0.94–0.98, respectively) pneumonia. Conclusions Given marked seasonality incidence mortality of pneumonia, the modest readmissions suggests that may be more related non–seasonally dependent factors than seasonal nature these diseases.