Assessment of International Frontal Sinus Anatomy Classification among senior residents through inter- and intra-rater reliability

Computed tomography scan of a single agger nasi cell showing the A) axial plane, B) coronal plane, C) sagittal plane

Computed tomography scan of frontal septal cell showing the A) axial plane, B) coronal plane, C) sagittal plane .

Overall classification accuracy for the different images using the International Frontal Sinus Anatomy Classification. Poor: score = less than 60%; good: score = 60% or more.

Two-way mixed effect model where people effects are random and measures effects are fixed.