Table 2.

Patients' characteristics according to group allocation.

	Group 1 (N=45)				Group 2 (n=37)				Group 3 (N=22)
	%	Mean ± SD	Median	IQR	%	Mean ± SD	Median	IQR	%	Mean±SD	Median	IQR	P-value
Age (years)		57.5±13.6	59.0	48 - 66		63.2±10.8	64.5	55.3 - 70.0		63.3 ± 13.9	63.5	58 - 74	0.075b
Sex (male)	64.4				73.7				50.0				0.193c
Height (cm)		167±8.66	166	162 - 170		165±6.88	168	160 - 170		167 ± 12.7	168	161 - 172	0.779a
Weight (kg)		76.9±16.2	76.5	65 - 90		73.6±18.4	70.0	60.8 - 80.0		78.4 ± 15.8	75.0	70 -80	0.631a
BMI (kg/m2)		26.9±5.75	26.4	22 - 30		27.2±4.99	25.1	23.4 - 31.2		29.2 ± 5.2	29.7	26 - 31	0.511a
Blood type													0.891c
A	43.8				50.0				31.3
B	3.1				0.0				0.0
AB	15.6				18.2				18.8
O	37.5				31.8				50.0
Rh factor													0.416c
Positive	9.4				21.7				6.3
Negative	90.6				78.3				93.8
HBP	64.4				86.1				86.4				0.043c
Diabetes	37.8				38.9				40.9				0.970c
Active smoking	44.2				47.1				54.5				0.733c
CAD	59.1				68.4				81.8				0.201c
Stroke	7.0				5.7				0				0.717c
CKD	9.1				20.0				4.5				0.191c
COPD	9.1				14.3				13.6				0.727c
Previous MI	60.5				40.5				59.1				0.170c
EuroSCORE II		2.89±2.80	1.89	01/mar		4.93 ± 3.85	4.18	2.05 - 7.53		4.09 ± 3.95	1.80	1 - 6	0.078a
Surgery timing													<0.001c
Elective	86.7				45.9				77.3
Urgency	13.3				45.9				22.7
Emergency	0.0				8.1				0.0
Δ RT-PCR+ to surgery time		-48.4±51.6	-35	-70		4.74 ± 3.36	5.00	02/ago		23.7 ± 17.3	16.0	12 - 28	<0.001a

BMI=body mass index; CAD=coronary artery disease; CKD=chronic kidney disease; COPD=chronic obstructive pulmonary disease; EuroSCORE II=European System for Cardiac Operative Risk Evaluation; HBP=high blood pressure; IQR=interquartile range; MI=myocardial infarction; RT-PCR=reverse transcriptase-polymerase chain reaction; SD=standard deviation

^aGeneralized linear model with gamma distribution

^bGeneral linear model with Gaussian distribution

^cFisher's exact test