Clinical significance and risk factors for new onset and recurring atrial fibrillation following cardiac surgery - a retrospective data analysis

Table 1 Patient characteristics and clinical outcome of no AF vs new onset AF patients

Variable	No AF (n = 585)	New onset AF (n = 194)	p-Value
Age⁺	67 (58–75)	74 (66–78)	<0.001^#
Gender [number (%)]			ns^§
male	430 (73.5)	139 (71.6)
female	155 (26.5)	55 (28.4)
Weight at admission [kg]⁺	82 (72–94)	82 (73.2–91)	ns^#
ICU length of stay [d]⁺	1.8 (1.0–2.9)	3.9 (2.1–5.9)	<0.001^#
Duration of mechanical ventilation [h]⁺	6 (4–8)	7 (5–10)	<0.001^#
Dialysis [number (%)]	11 (1.9)	16 (8.2)	<0.001^§
Type of surgery [number (%)]			<0.001^§
CABG	370 (63.2)	108 (55.7)
Valve	169 (28.9)	51 (26.3)
CABG + valve	46 (7.9)	35 (18.0)
Ventricular arrhythmias [number (%)]	4 (0.7)	6 (3.1)	<0.001^$
AV block III [number (%)]	30 (5.1)	12 (6.2)	ns^§
Epinephrine administration [number (%)]	65 (11.1)	35 (18.0)	<0.05^§
Dobutamine administration [number (%)]	66 (11.3)	29 (14.9)	ns^§
Mortality [number (%)]	8 (1.4)	8 (4.1)	<0.05^$

Data are presented as absolute number and % (in brackets) or median together with the 1st and 3rd quartile (in brackets). P-values over the significance threshold of 0.05 are reported as not significant (ns)
+ Median (1st quartile - 3rd quartile), # Wilcoxon-Mann-Whitney test, § Chi-square test for independence, $ Fisher’s exact test
AV Atrio-ventricular, CABG Coronary artery bypass grafting, ICU Intensive care unit

ISSN: 1471-2253