Table VI.

Outcomes, Stratified by the Development of POAF among Patients without Pre-existing Atrial Fibrillation^*

Outcomes	POAF (N=3602)	No POAF (N=339003)	Unadjusted OR [95% CI]	P value	Adjusted OR [95% CI]	P value
Mortality	570 (15.8%)	6646 (2.0%)	9.40 [8.57–10.31]	<0.001	1.68 [1.52–1.86]	<0.001
Readmission 30 days	529 (14.7%)	32338 (9.5%)	1.63 [1.49–1.79]	<0.001	1.02 [0.92–1.14]	0.673
			Unadjusted Difference in Means [95% CI]		Adjusted Difference in Means [95% CI]
Length of Stay, median, [IQR]†	13 [8–22]	4 [3–7]	+275% [268%–182%]	<0.001	+ 37.3% [33.9%–40.9%]	<0.001
Hospitalization Cost, median, [IQR]‡	25205 [18041–36280]	+14525 [10202–20987]	+10617 [10224–11011]	<0.001	+ 5914 [5416–6412]	<0.001

Abbreviations: POAF, Post-operative atrial fibrillation

^*Patients with pre-existing atrial fibrillation, as determined by present-on-admission coding, were excluded from this analysis

^† Length of stay log transformed in adjusted and unadjusted models, length of stay is in days

^‡ top 5th percentile of cost removed to reduce skewness, cost is in dollars