Table 2. Operative data.

Variables	Group A (n=49)	Group B (n=22)	P value
Aortic valve replacement	20 (40.8)	13 (59.1)	0.201
Mitral valve repair	3 (6.1)	1 (4.5)	1.000
Mitral valve replacement	28 (57.1)	13 (59.1)	1.000
Double valve replacement	2 (4.1)	4 (18.2)	0.070
Aortomitral curtain reconstruction	2 (4.1)	2 (9.1)	0.583
Tissue valve implantation	15 (30.6)	11 (50.0)	0.182
Aortic cross clamp time, minutes	92.73±40.86	95.73±40.33	0.775
Cardiopulmonary bypass time, minutes	122.24±53.49	128.82±67.28	0.660

Categorical variables are shown as numbers with percentages, and continuous variables are shown as mean ± standard deviation.