. Author manuscript; available in PMC: 2010 Nov 24.

Published in final edited form as: Osteoarthritis Cartilage. 2009 Nov 11;18(3):323–328. doi: 10.1016/j.joca.2009.11.002

Table I.

Definitions of ANY and severe feature scores from WORMS used to derive worsening (≥1 change) and severe changes at each subregion

Pathologic features	Scale range	Sub regions	ANY	Severe
Cartilage lesion (CART)	0–6	T, F, Pt	>1	≥5
Osteophytes (OST)	0–7	T, F, Pt	>0	≥4
Bone marrow lesion (BML)	0–3	T, F, Pt, Ts	>0	≥2
Bone cysts (CYST)	0–3	T, F, Pt, Ts	>0	≥2

T = tibia medial/lateral anterior/central and posterior. F = femur medial/lateral anterior/central and posterior. Pt = patella medial and lateral. Ts = tibial subspinous.