Table 3. Overall characteristics of patients and their perioperative data comparing (control) and (pandemic) groups.

	2018/19 years (control) group (n=166)			2020/21 years (pandemic) group (n=95)			p
	n	%	Mean±SD	n	%	Mean±SD
Before surgery
Age (year)			65.17±10.6			65.5±8.5	0.762
Body mass index (kg/m2)			28.1±4.7			30.3±5.3	0.001
Diabetes mellitus type 2 (insulin-dependent)	33	19.9		27	33.3		0.021
COPD	15	9		3	3.7		0.130
Smoking	27	16.4		12	14.8		0.755
Chronic atrial fibrillation	30	18.2		19	23.5		0.330
Bed days before surgery			6±5.4			4.5±4.5	0.017
Perioperative period
Urgent surgery	7	4.2		7	8.6		0.158
Elective surgery	149	89.8		71	87		0.619
Emergency surgery	10	6		3	3.7		0.443
CABG	97	58.4		50	61.7		0.620
CABG + valve surgery	35	21.1		16	19.8		0.808
Valve surgery	30	18.1		15	18.5		0.932
Cardiac arrest time (min)			56.7±24.2			60±27.9	0.351
SD: Standard deviation; COPD: Chronic obstructive pulmonary disease; CABG: Coronary artery bypass grafting.