Table 6

Multiple logistic regression to control for potential confounders

P

OR

AUC

Sensitivity (%)

Specificity (%)


Main PA diameter ≥29 mm

0.0196

4.8

0.93

77.4

89.6

Left PA diameter ≥24 mm

0.2160

2.6

0.92

77.4

87.5

Right PA diameter ≥25 mm

0.4461

1.9

0.91

73.6

93.8

RDPA diameter 19 mm

0.0059

7.0

0.93

83.0

85.4

True RDPA diameter 16 mm

0.0487

4.1

0.92

83.0

87.5

True LDPA diameter 21 mm

0.0075

15.5

0.93

79.2

91.7

RV free wall 6 mm

0.0303

30.5

0.95

81.0

91.9

RV lumen ≥30 mm

0.0915

5.8

0.95

92.9

73.0

LV free wall ≥15 mm

0.1607

5.2

0.95

85.7

83.8

LV lumen ≥57 mm

0.3945

3.0

0.94

76.2

88.9

Hilar diameter ≥124 mm

0.2968

2.2

0.92

81.1

75.0

RV wall/LV wall ratio 0.32

0.0141

8.8

0.96

78.6

83.8

RV lumen/LV lumen ratio 1.28

0.0196

28.8

0.95

85.7

86.1

L apical artery/bronchus ratio ≥1.75

0.2851

3.5

0.92

75.5

87.5

Hilar/thoracic ratio ≥0.52

0.0757

3.7

0.92

75.5

87.5

Main PA/AA ratio 0.84

0.0208

6.0

0.93

73.6

91.7

Main PA/DA ratio 1.29

0.0269

5.7

0.93

77.4

89.6

IV septum bowing into LV (yes or no)

0.1053

11.6

0.95

81.0

89.2

Main PA/AA ratio >1

0.0085

9.1

0.93

86.8

79.2


Regression of the outcome variable (PH vs. no-PH) to the predictors:

ULN for each hypothesized predictor of PH, age, sex, ascending aorta diameter (AA), BSA, thoracic diameter (TD), and pulmonary wedge pressure (PWP) >15 mmHg.

Note: one logistic regression model was created for each hypothesized predictor of PAH. For example, the analysis in the first row above included the predictors: Main PA diameter ≥29, age, sex, AA, BSA, TD, and PWP >15. See table 1 for definitions of radiographic metrics.

Chan et al. BMC Medical Imaging 2011 11:7   doi:10.1186/1471-2342-11-7

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