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Table 3 Subgroup analysis

From: Effects of caffeine on the detection of ischemia in patients undergoing adenosine stress cardiovascular magnetic resonance imaging

 

N

16-segments model

60-segments model

Ischemic volume [ml]

 

W/o caffeine

W caffeine

p-values*

W/o caffeine

W caffeine

p-values*

W/o caffeine

W caffeine

p-values*

No infarction

21

7.1 ± 3.5

6.1 ± 3.3

p = 0.89

15.8 ± 7

13.4 ± 7.1

p = 0.46

4.1 ± 2.2

3.5 ± 2.4

p = 0.37

Infarctiona

9

9.8 ± 2.9

8.9 ± 3.3

25.1 ± 9.1

21 ± 10.1

4.4 ± 3.1

3.2 ± 2.5

No CAD

14

8.3 ± 2.8

7.6 ± 3.8

p = 0.43

20.6 ± 9.5

17.3 ± 10.0

p = 0.73

4.4 ± 2.8

3.6 ± 3.0

p = 0.85

Known CAD

16

7.5 ± 4.3

6.3 ± 3

16.4 ± 7.4

13.9 ± 6.8

4.0 ± 2.1

3.1 ± 1.4

No CABG

26

7.5 ± 3.5

6.6 ± 3.6

p = 0.58

18.2 ± 9.3

14.8 ± 8.7

p = 0.18

4.2 ± 2.7

3.3 ± 2.5

p = 0.26

CABG

4

10.8 ± 2.2

9.3 ± 1

21.0 ± 2.9

21.8 ± 5.9

4.2 ± 0.2

4.3 ± 1.1

  1. *= p-values for difference in segments/volume (w/o caffeine - w caffeine) between groups (e.g. no infarction vs. infarction)
  2. a = defined as ischemic type late gadolinium enhancement (LGE), other abbreviations see Table 1