The death risk factors of patients undergoing re-exploration for bleeding or tamponade after isolated off-pump coronary artery bypass grafting: a case–control study

Table 1 Preoperative patient characteristics

	Overall patients			Matched population
	Survival group (N = 42)	Death group (N = 16)	P value	Survival group (N = 15)	Death group (N = 15)	P value
Sex, male	36(85.71%)	12(75%)	0.564	14(93.33%)	11(73.33%)	0.330
Age, years	64.67 ± 8.02	63.75 ± 10.10	0.719	63.13 ± 6.90	63.533 ± 10.41	0.902
BMI, kg/m²	24.02 ± 3.23	26.24 ± 3.52^A	0.030	24.53 ± 3.22	26.24 ± 3.52	0.062
Hypertension	25(59.52%)	11(68.75%)	0.517	6(40%)	11(73.33%)	0.139
Diabetes	17(40.48%)	7(43.75%)	0.821	4(26.67%)	6(40%)	0.700
Carotid artery stenosis	17(47.22%)^D	9(69.23%)^C	0.173	8(53.33%)	9(69.23%)^B	0.560
Cerebral infarction	8(19.05%)	5(31.25%)	0.520	4(26.67%)	5(33.33%)	1.000
Heart insufficiency	10(23.81%)	10(66.67%)^A	0.003	4(26.67%)	10(66.67%)	0.066
Respiratory insufficiency	17(47.22%)^D	6(42.86%)^B	0.781	4(26.67%)	5(33.33%)^B	1.000
Hepatic insufficiency	11(27.5%)^B	4(26.67%)^A	1.000	4(26.67%)	4(26.67%)	1.000
Renal insufficiency	7(17.5%)^B	2(13.33%)^A	0.895	0(0%)	2(13.33%)	0.483
Time between myocardial infarction and surgery, days, (Q1–Q3)	14(10–16)	11.50(7.25–17.75)	0.239	15.67 ± 7.05	13.6 ± 7.64	0.239

BMI, body mass index; carotid artery stenosis was diagnosed by Doppler ultrasonography; Heart insufficiency, LVEF < 50%; Respiratory insufficiency, PO₂ < 83 mmHg; Hepatic insufficiency, ALT > 50 U/L; Renal insufficiency, creatinine > 132μmoI/L; Missing data: ^Aout of 1 patient; ^Bout of 2 patients; ^Cout of 3 patients; ^Dout of 6 patients

ISSN: 1471-2261