Cervical Spine Injury Classification Systems

Classification Systems

The Subaxial Injury Classification System (SLICS) uses three weighted major categories, including Injury Morphology, Discoligamentous Complex (DLC) Integrity, and Neurological Status, to create a severity score that guides surgical decision-making 1, 2
The AO Spine classification system is a hierarchical morphological system based on CT imaging, categorizing injuries into Type A, B, and C, with a separate neurological grading component (N0-N4) 3, 4

SLICS demonstrates excellent reliability with intraclass correlation coefficients ranging 0.49-0.90 for different components, and has a treatment algorithm with a score of ≥5 indicating surgical intervention and <4 suggesting conservative management 1, 2
AO Spine provides superior morphological description with good to excellent inter- and intraobserver reliability for the main injury types (A, B, C), but lacks a validated treatment algorithm 3, 4

SLICS incorporates neurological status as a weighted component affecting the severity score, while AO Spine adds it as a separate grading system without integration into treatment algorithms 2
SLICS explicitly addresses discoligamentous integrity as a critical decision point, requiring MRI assessment when suspected, whereas AO Spine focuses on CT-based morphological patterns 1, 2