Table 5.

Relationship between New York Heart Association functional class and postoperative atrial fibrillation.

Functional class	AF	No AF	P value
I	50%	63%	0.09
II	33%	26%	0.8
III	11%	7.6%	0.05
IV	6%	3.4%	0.9

Note: Differences were considered significant at P < 0.05.

Abbreviation: AF, atrial fibrillation.