A quantitative metric for knee osteoarthritis: reference values of joint space loss.

ABSTRACT:

Objectives

Knee osteoarthritis (OA) onset and progression has been defined with transitions in Kellgren-Lawrence (KL) grade or Osteoarthritis Research Society International (OARSI) Joint Space Narrowing (JSN) grade. We quantitatively describe one-year transitions in KL grade and JSN, using fixed joint space width (fJSW), among knees with or at risk of OA.

Methods

Radiographic assessments from the Osteoarthritis Initiative (OAI) were used to identify transitions in KLG and JSN grade between consecutive annual visits. The fJSW was measured in the medial and lateral compartments. The distribution of change in fJSW for KLG and JSN transitions were described, and mean change in fJSW was estimated using mixed models.

Results

KL grade and JSN scores were available for about

SUBMITTER: Ratzlaff C 

PROVIDER: S-EPMC6098736 | biostudies-literature | 2018 Sep

REPOSITORIES: biostudies-literature