title: Seasonal incidence of hospital admissions for Stanford type A aortic dissection.
abstract: The objective of this study was to test the hypothesis that there is seasonal variation in the incidence of Stanford type A aortic dissection (SA-AoD) among patients admitted to our cardiovascular surgical service. A sinusoidal logistic regression model was used to analyze event data for 6081 calendar days. A cyclic peak risk for SA-AoD was observed for calendar day 304 (p=0.019). The odds ratios for the 3- and 6-month window surrounding this peak were 1.6 (p=0.054) and 1.7 (p=0.0040), respectively. Our results suggest than a seasonal variation exists in the incidence of SA-AoD.
authors.affiliation: Department of Cardiovascular Sciences, East Carolina Heart Institute, Brody School of Medicine, East Carolina University , Greenville, NC , USA .
authors.forename: Jimmy T
authors.initials: JT
authors.lastname: Efird
authors.forename: Wesley T
authors.initials: WT
authors.lastname: O'Neal
authors.forename: Stephen W
authors.initials: SW
authors.lastname: Davies
authors.forename: Jason B
authors.initials: JB
authors.lastname: O'Neal
authors.forename: Alan P
authors.initials: AP
authors.lastname: Kypson
mesh_terms: D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D001018:Aortic Diseases / Q000453:epidemiology* / Q000601:surgery; D005260:Female; D006760:Hospitalization / Q000706:statistics & numerical data*; D006801:Humans; D015994:Incidence; D016015:Logistic Models; D008297:Male; D008875:Middle Aged; D016017:Odds Ratio; D012307:Risk Factors; D012621:Seasons; D013997:Time Factors
keywords: Aortic dissection; seasonality; sinusoidal logistic regression