Table 1 Reliability analysis showing interobserver agreement in the measurements of different anatomical structures expressed as intraclass correlation coefficient (ICC).

Maxillary sinus:

Craniocaudal diameter

0.88 (0.80-0.92)

0.87 (0.80-0.92)

2.4

2.5

A-P diameter

0.79 (0.68-0.87)

0.79 (0.67-0.87)

2.7

2.8

Anterior wall thickness

0.58 (0.38-0.73)

0.59 (0.39-0.73)

0.4

0.4

Frontal sinus:

A-P diameter

0.80 (0.68-0.88)

0.86 (0.77-0.91)

2.1

1.8

Anterior wall thickness

0.84 (0.74-0.90)

0.87 (0.79-0.92)

0.5

0.4

Canine fossa:

AP-diameter

0.73 (0.58-0.83)

0.75 (0.62-0.85)

2.6

2.7

Orbital floor:

Thickness

0.50 (0.29-0.67)

0.57 (0.37-0.72)

0.3

0.3