Table 1 Patient demographic, medical, and surgical characteristics according to the occurrence of MINS.

From: Association between blood groups and myocardial injury after non-cardiac surgery: a retrospective cohort study

Variables

Whole cohort (n = 1201)

O (n = 351)

A (n = 336)

B (n = 400)

AB (n = 114)

Age (yr), mean (SD)

64.9 (8.8)

64.8 (8.8)

64.7 (8.7)

65.2 (9.0)

64.6 (8.7)

Sex (male, %)

728 (60.6)

221 (63.0)

205 (60.8)

234 (58.5)

69 (60.5)

BMI (kg m−2), mean (SD)

23.7 (3.5)

23.7 (3.3)

23.9 (3.4)

23.7 (3.6)

23.4 (3.6)

Smoking (%)

512 (42.6)

147 (41.9)

156 (46.4)

165 (41.0)

45 (39.5)

Comorbidities (%)

 Coronary artery disease

145 (12.1)

39 (11.1)

44 (13.1)

50 (12.5)

12 (10.5)

 Hypertension

483 (40.2)

136 (38.7)

132 (39.3)

162 (40.5)

53 (46.5)

 Diabetes mellitus

212 (17.7)

59 (16.8)

61 (18.2)

74 (18.5)

18 (15.8)

 Cerebrovascular diseases

147 (12.2)

49 (14.0)

40 (11.9)

43 (10.8)

15 (13.2)

Surgical procedure type (%)

 Hepatobiliary

69 (5.7)

19 (5.4)

19 (5.6)

23 (5.7)

8 (7.0)

 Urinary

92 (7.6)

24 (6.8)

28 (8.3)

31 (7.7)

9 (7.9)

 Colorectal

361 (29.9)

111 (31.6)

104 (30.1)

108 (26.9)

38 (33.3)

 Spine

124 (10.2)

29 (8.2)

41 (12.2)

41 (10.2)

13 (11.4)

 Thoracic

193 (16.0)

48 (13.6)

59 (17.5)

70 (17.4)

16 (14.1)

 Preoperative serum creatinine (μmol L−1), median (IQR)

65.1 (55.8; 75.8)

65.9 (55.6; 76.4)

64.5 (55.9; 76.3)

64.7 (55.4; 75.2)

65.4 (56.4; 75.4)

Medication use (%)

 Beta blockers

27 (2.2)

9 (2.6)

5 (1.5)

12 (3.0)

1 (0.9)

 ACE inhibitors

10 (0.8)

4 (1.1)

1 (0.3)

3 (0.8)

2 (1.8)

 Aspirin

15 (1.2)

4 (1.1)

6 (1.8)

4 (1.0)

1 (0.9)

 Insulin

63 (5.2)

18 (5.1)

23 (6.8)

19 (4.8)

3 (2.6)

 CCB

128 (10.7)

31 (8.8)

40 (11.9)

47 (11.8)

10 (8.8)

 Blood loss (ml), median (IQR)

200 (100; 300)

200 (100; 400)

200 (100; 400)

200 (100; 300)

200 (100; 300)

 Preoperative hemoglobin (g L−1), median (IQR)

137 (123; 149)

140 (124; 150)

136 (123; 148)

137 (124; 149)

135 (118; 150)

 Preoperative WBC

6.3 (5.2; 7.6)

6.3 (5.4; 7.6)

6.3 (5.2; 7.6)

6.2 (5.1; 7.7)

6.4 (5.1; 7.7)

  1. Statistics are expressed as count (percentage), median (inter-quartile range), or mean (standard deviation). ACE, angiotensin-converting enzyme; WBC, white blood cells; IOR, interquartile range; CCB, calcium channel blocker; MINS, myocardial injury after non-cardiac surgery.
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