Table 2

Grading systems

Hip featureScale of grading systemReference
Labrum0=normal variant such as aplasia or hypoplasia
1=abnormal signal and/or fraying
2=simple tear
3=labrocartilage separation
4=complex tear
5=maceration
SHOMRI31
Articular cartilage
(acetabular, femoral)
0=no loss
1=partial thickness
2=full thickness loss
SHOMRI31
Subchondral
bone marrow
(acetabular, femoral)
Oedema
0=no lesion is present
1≤0.5 cm in size
2>0.5 cm but ≤1.5 cm
3>1.5 cm in size
Cysts
0=absent lesion
1≤0.5 cm in size
2>0.5 cm in size
SHOMRI31
Tendons0=normal
1=tendinosis (intermediate signal, not fluid)
2=low-grade partial thickness tear (<50% tendon fluid signal)
3=high-grade partial thickness tear (≥50% tendon fluid signal)
4=full thickness tear (complete fluid signal)
Chi et al32
Ligaments0=normal
1=signal abnormalities or fraying
2=partial tear
3=complete tear
SHOMRI31
Other findingsBinary (present/absent)
  • Note: SHOMRI, scoring hip osteoarthritis with MRI. The labrum was assessed in four subregions: anterior, posterior, anterosuperior and superior. The articular cartilage and bone marrow were each divided in the acetabular region (four subregions: anterior, posterior, superolateral and superomedial) and femoral region (six subregions: anterior, posterior, lateral, superolateral, superomedial and inferior).