Table 4

Discordance between grades for lateral patellofemoral joint space narrowing (JSN) using the Osteoarthritis Research Society (OARS) and line drawing atlases. All scores graded by the three observers at the first reading are shown

Lateral patellofemoral JSN: OARS atlasLateral patellofemoral JSN: line drawing atlas
0123Total
05686142
12424149
2143549
335760
Total561117063300