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Table 1 The demographic data and risk factors in both groups

From: Can QT dispersion improve the accuracy of stress ECG TMT in detecting myocardial ischemia in chronic stable CAD patients? A stress myocardial perfusion imaging study

Variables

Group 1

Group 2

Ӽ2 value

P value

Abnormal perfusion (no. = 50)

Normal perfusion (no. = 50)

No.

(%)

No.

(%)

Sex (male)

49

98%

47

94%

0.2604

0.6098

Hypertension

33

66%

29

58%

0.382

0.5365

DM

22

44%

14

28%

2.1267

0.1447

Smoking

36

72%

33

66%

0.187

0.6654

CABG:

(9)

18%

(4)

8%

3.7874

0.2854

• 2 grafts

3

6%

0

0%

  

• 3 grafts

5

10%

3

6%

  

• 4 grafts

1

2%

1

2%

  

PCI:

(20)

40%

(26)

52%

11.646

0.0703

• 1 stent

4

8%

14

28%

  

• 2 stents

5

10%

7

14%

  

• 3 stents

6

12%

5

10%

  

• > 3 stents

5

10%

0

0%

  

MPI type:

• Normal

0

0%

50

100%

  

• Ischemia

26

52%

0

0%

  

• Scar

7

14%

0

0%

  

• Mixed (same segment)

12

24%

0

0%

  

• Ischemic/scar (different segments)

5

10%

0

0%

  

MPI severity degree:

• No ischemia

7

14%

50

100%

  

• Mild

23

46%

0

0%

  

• Moderate

14

28%

0

0%

  

• Severe

6

12%

0

0%

  
  1. CABG coronary artery bypass graft, DM diabetes mellitus, PCI percutaneous coronary intervention