Table 1. Demographic and operative characteristics of octogenarian patients (n=116).

	n	%	Mean±SD	Median	IQR
Age (year)			82.9±3.1
Sex
Male	73	62.9
Female	43	37.1
Body mass index (kg/m2)			28.5±4.7
Body mass index (n=95)
Normal	27	28.4
Overweight	32	33.7
Obese class I	24	25.3
Obese class II	12	12.6
Operation
Elective	89	76.7
Urgent	27	23.3
Operation type
CABG	65	56.0
Mitral valve surgery	20	17.2
Aortic valve surgery	10	8.6
Aortic valve surgery + CABG	16	13.8
Mitral valve surgery + CABG	5	4.3
Diabetes mellitus	54	46.6
Hypertension	52	44.8
Preoperative pulmonary artery pressure			30.9±13.1
Pulmonary hypertension
Normal	68	58.6
Moderate	42	36.2
Severe	6	5.2
Cardiopulmonary bypass time			118.6±37.4
Aortic cross clamp time				85	64-118
Creatinine clearance			62.3±17.7
Preoperative ejection fraction			51.6±9.7
Preoperative ejection fraction (n=110)
Normal	63	57.3
Moderate	40	36.4
Low	7	6.4
Peripheral arterial disease	2	1.8
History of stroke	3	2.6
Postoperative stroke	7	6.0
Postoperative renal failure	16	13.8
Postoperative infection	12	10.3
Reoperation	30	25.9
Mechanical ventilation time (days)				1	1-2
Length of stay in the intensive care				2	1-3
Total length of stay				7	6-12
EuroSCORE II			5.2±5.4
Society of thoracic surgeons			3.7±11.1
Mortality	32	27.6
SD: Standard deviation; IQR: Interquartile range; CABG: Coronary artery bypass grafting.