Table 3 Postoperative data of the two groups.

	Before PSM (n = 119)				After PSM (n = 50)
	TAR with FET (n = 88)	HAR (n = 31)	t/χ²	P value	TAR with FET (n = 25)	HAR (n = 25)	t/χ²	P value
Fluid drainage in 24 h (ml)	780.8 ± 210.4	645.5 ± 208.5	3.086	0.002	770.9 ± 201.6	650.1 ± 210.4	2.073	0.044
LCOS (n, %)	6 (6.8)	1 (3.2)	0.534	0.465	2 (8.0)	1 (4.0)		1.000*
IABP (n, %)	2 (2.3)	0 (0.0)		0.490*	1 (4.0)	0 (0.0)		1.000*
ALI (n, %)	29 (32.9)	4 (12.9)	4.599	0.032	11 (44.0)	4 (16.0)	4.667	0.031
AKI (n, %)	41 (46.5)	7 (22.6)	5.491	0.019	12 (44.0)	5 (20.0)	4.367	0.037
CRRT (n, %)	10 (11.4)	1 (3.2)	1.810	0.179	3 (12.0)	1 (4.0)		0.609*
Pulmonary infection (n, %)	31 (35.2)	5 (16.1)	4.381	0.036	8 (32.0)	4 (16.0)	1.754	0.185
Tracheotomy (n, %)	9 (12.5)	2 (6.5)	0.390	0.533	3 (12.0)	2 (8.0)		1.000*
Thoracotomy hemostasis (n, %)	3 (6.9)	0 (0.0)		0.567*	1 (4.0)	0 (0.0)		1.000*
Gastrointestinal bleeding (n, %)	2 (2.3)	1 (3.2)		1.000*	0 (0.0)	1 (4.0)		1.000*
TND (n, %)	12 (13.6)	3 (9.7)	0.326	0.568	4 (16.0)	3 (12.0)		1.000*
PND (n, %)	1 (1.2)	0 (0.0)		1.000*	1 (4.0)	0 (0.0)		1.000*
Paraplegia (n, %)	2 (2.3)	1 (3.2)		1.000*	1 (4.0)	1 (4.0)		1.000*
Mechanical ventilation time (h)	47.4 ± 15.9	35.2 ± 11.4	3.926	< 0.001	45.5 ± 13.6	34.0 ± 10.9	3.299	0.002
ICU time (d)	6.2 ± 2.4	3.6 ± 2.1	5.350	< 0.001	5.9 ± 2.2	3.8 ± 2.2	3.375	0.002
Hospital stay time (d)	16.8 ± 4.6	13.2 ± 3.8	3.909	< 0.001	17.5 ± 5.3	13.0 ± 4.0	3.512	< 0.001
In-hospital mortality (n, %)	13 (14.8)	2 (6.5)	1.441	0.230	4 (16.0)	1 (4.0)		0.349*

PSM propensity score-matched, TAR total aortic arch replacement, FET frozen elephant trunk implantation, HAR hybrid II aortic arch replacement, LCOS low cardiac output syndrome, IABP intra-aortic ballon pump, ALI acute liver injury, AKI acute kidney injury, CRRT continuous renal replacement therapy, TND transient neurological dysfunction, PND permanent neurological dysfunction, ICU intensive care unit, h hour, ml milliliter, d day.
*Indicates Fisher’s exact test.

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