Table 2.

Comparison of characteristics between patients with AF and those without.

Characteristic	Sinus rhythm	Atrial fibrillation	p
Male gender	102	9	0.77
Mean age	72	73	0.64
Rectal cancer	52	4	0.99
Elective surgery	139	8	0.05
Pre-operative radiotherapy	2	1	0.22
Anastomotic leak	3	0	0.79
Dukes Stage
A	24	2	0.73*
B	69	6
C	53	4
D	16	1

*Fisher-Freeman-Halton Exact Test