Table 1.

Size grades definition for cartilage subscores in sMOAKS (supplemented MOAKS) and traditional MOAKS.

Feature	Any cartilage loss (partial- or full-thickness):	Any deep cartilage loss (partial-thickness >50% and full-thickness):	Full-thickness cartilage loss
Scoring System	sMOAKS Traditional MOAKS	sMOAKS only	sMOAKS Traditional MOAKS
Grade	Grade 0: none	Grade 0: none	Grade 0: none
	Grade 1: <10% subregion    cartilage surface	Grade 1: <10% subregion    cartilage surface	Grade 1: <10% subregion    cartilage surface
	Grade 2: 10%–75% subregion    cartilage surface	Grade 2: 10%–75% subregion    cartilage surface	Grade 2: 10%–75% subregion    cartilage surface
	Grade 3: >75% subregion    cartilage surface	Grade 3: >75% subregion    cartilage surface	Grade 3: >75% subregion    cartilage surface

MOAKS, Magnetic Resonance Imaging Osteoarthritis Knee Score.