Table 1 Baseline characteristics.

From: Artificial intelligence fully automated myocardial strain quantification for risk stratification following acute myocardial infarction

Variables

All patients (n = 1095)

MACE (n = 78)

No MACE (n = 1015)

p value

Age (years)

64 (53–72)

72 (61–77.25)

63 (52–72)

 < 0.001*

Sex (male)

820/1095 (74.9)

52/78 (66.7)

767/1015 (75.6)

0.081

Cardiovascular risks factors

 

Active smoking

443/1015 (43.6)

22/71 (31.0)

420/1015 (41.4)

0.026*

Hypertension

778/1093 (71.2)

65/78 (83.3)

711/1013 (70.2)

0.014*

Hyperlipoproteinemia

414/1087 (38.1)

27/78 (34.6)

386/1007 (38.3)

0.515

Diabetes mellitus

259/1092 (23.7)

28/78 (35.9)

230/1012 (22.7)

0.008*

Body mass index (kg/m2)

27.45 (24.95–30.35)

27.34 (25.27–31.04)

27.45 (24.91–30.2)

0.685

Previous Myocardial infarction

73/1093 (6.7)

5/78 (6.4)

67/1013 (6.6)

0.944

ST-segment elevation

759/1095 (69.31)

52/78 (66.7)

707/1015 (69.7)

0.581

Time symptoms to balloon, *min

180 (110–316)

192 (115.75–372.75)

180 (110–310)

0.344

Door-to-balloon time, *min

30 (22–42)

27.5 (22.5–39.5)

30 (22–42)

0.429

Killip class on admission

 < 0.001*

1

967/1095 (88.3)

50/78 (64.1)

915/1015 (90.1)

 

2

88/1095 (8)

18/78 (23.1)

70/1015 (6.9)

 

3

23/1095 (2.1)

5/78 (6.4)

18/1015 (1.8)

 

4

17/1095 (1.6)

5/78 (6.4)

12/1015 (1.2)

 

Diseased vessels

0.010*

1

546/1095 (49.9)

28/78 (35.9)

517/1015 (50.9)

 

2

327/1095 (29.9)

25/78 (32.1)

302/1015 (29.8)

 

3

222/1095 (20.3)

25/78 (32.1)

196/1015 (19.3)

 

Affected artery

0.134

Left anterior descending

450/1095 (41.1)

41/78 (52.6)

409/1015 (40.3)

 

Left circumflex

227/1095 (20.7)

15/78 (19.2)

210/1015 (20.7)

 

Left main

6/1095 (0.5)

1/78 (1.3)

5/1015 (0.5)

 

Right coronary artery

405/1095 (37)

20/78 (25.6)

385/1015 (37.9)

 

Bypass graft

7/1095 (0.6)

1/78 (1.3)

6/1015 (0.6)

 

TIMI flow grade before PCI

0.604

0

551/1095 (50.3)

44/78 (56.4)

506/1015 (49.9)

 

1

126/1095 (11.5)

6/78 (7.7)

120/1015 (11.8)

 

2

218/1095 (19.9)

14/78 (17.9)

203/1015 (20)

 

3

200/1095 (18.3)

14/78 (17.9)

186/1015 (18.3)

 

Stent implanted

1068/1095 (97.5)

76/78 (97.4)

990/1015 (97.5)

0.661

TIMI flow grade after PCI

0.177

0

21/1095 (1.9)

1/78 (1.3)

20/1015 (2)

 

1

23/1095 (2.1)

4/78 (5.1)

19/1015 (1.9)

 

2

82/1095 (7.5)

8/78 (10.3)

74/1015 (7.3)

 

3

969/1095 (88.5)

65/78 (83.3)

902/1015 (88.9)

 

Time to MRI, days

3 (2–4)

3 (2–4)

3 (2–4)

0.022*

  1. Patient data are represented either by n/N (%) or median (interquartile range). P values compare the variables with the occurrence of MACE. Two patients were lost to follow up (MACE).
  2. PCI, Percutaneous coronary intervention; MACE, major adverse cardiac event; TIMI, Thrombolysis in myocardial infarction.
  3. *Indicates statistical significance. Mann–Whitney U test was performed for continuous variables and Chi-square test was performed for categorical variables.