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Table 4 Predictors of right atrial enlargement according to RA volume index

From: Reference right atrial dimensions and volume estimation by steady state free precession cardiovascular magnetic resonance

Univariate analysis:

OR

95%CI

p value

Chi square

4-chamber longitudinal diameter (>6.6 cm)

13.6

6.97, 26.62

<0.001

NA

4-chamber transverse diameter (>5.8 cm)

5.0

2.41, 10.37

<0.001

18.7

4-chamber area (>30 cm2)

17.05

6.99, 41.17

<0.001

39.2

2-chamber longitudinal diameter (>6.5 cm)

9.6

4.14, 22.36

<0.001

27.7

2-chamber transverse diameter (>5.7 cm)

12.1

4.89, 30.12

<0.001

29

2-chamber area (>29 cm2)

21.6

6.83, 68.14

<0.001

27.4

4-chamber longitudinal diameter indexed (>3.6 cm/m2)

8.4

4.14, 17.12

<0.001

34.5

4-chamber transverse diameter indexed (>3.2 cm/m2)

8.4

3.29, 21.45

<0.001

19.8

4-chamber area indexed (>15 cm2/m2)

10.8

4.66, 25.18

<0.001

30.7

2-chamber longitudinal diameter indexed (>3.5 cm/m2)

12.0

3.71, 38.82

<0.001

17.2

2-chamber transverse diameter indexed (>3.2 cm/m2)

8.7

3.67, 20.44

<0.001

24.3

2-chamber area indexed (>16 cm2/m2)

38.5

9.55, 154.82

<0.001

26.4

Multivariate analysis (indexed parameters):

OR

95%CI

p value

Chi square

2-chamber area indexed (>16 cm2/m2)

6.71

2.35, 19.13

<0.001

32.9

2-chamber longitudinal diameter indexed (>3.5 cm/m2)

7.78

2.14, 28.35

0.002

 
  1. The upper limit of normal is shown in brackets according to Table 2.