Table 3 Agreement between observers (Cohen’s kappa) for the presence of the evaluated CT findings

 Subglottic trachea

0.84

0.95

0.89

 Cervical trachea

0.77

0.91

0.86

 Thoracic trachea

0.76

0.91

0.85

 Main bronchi

0.65

0.87

0.77

 Lobar bronchi

0.17

0.70

0.33

 Distal bronchi

0.59

0.73

0.87

Extensive involvement

0.81

0.81

1.00

 Trachea

0.59

0.77

0.79

 Bronchi

0.78

0.91

0.87

 Sparing the posterior tracheal membrane

0.55

0.78

0.78

 Irregular

0.21

0.21

1.00

 Trachea

0.50

0.89

0.63

 Main/lobar bronchi

0.63

0.77

0.85

 Distal bronchi

0.58

0.72

0.85

Tracheal calcifications

0.75

1.00

0.75

Tracheobronchomalacia

0.20

0.60

0.50

Bronchiectasis

0.34

0.60

0.65

Mosaic perfusion

0.49

0.93

0.58

Air trapping

0.00

0.86

0.00

Pulmonary nodule

0.67

0.85

0.81

Pulmonary consolidation

0.28

0.51

0.63