Radiographic assessment of patellofemoral osteoarthritis.

A Coefficient of Agreement for Nominal Scales

Jacob Cohen · Educational and Psychological Measurement · 1960 · 41.3K citations

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Radiological Assessment of Osteo-Arthrosis

Jan Kellgren, J. S. Lawrence · Annals of the Rheumatic Diseases · 1957 · 12.4K citations · Full text

Medicine, Orthopaedic Surgery, Radiology +10

Weighted kappa: Nominal scale agreement provision for scaled disagreement or partial credit.

Jacob Cohen · Psychological Bulletin · 1968 · 8.5K citations

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Osteoarthrosis of the knee : A radiographic investigation

S.-O. Ahlbäck · Medical Entomology and Zoology · 1968 · 1.4K citations

Medicine, Orthopaedic Surgery, Orthopedic Surgery +11

Radiographic patterns of osteoarthritis of the knee joint in the community: the importance of the patellofemoral joint.

Timothy E. McAlindon, S Snow, Cyrus Cooper et al. · Annals of the Rheumatic Diseases · 1992 · 598 citations

Medicine, Orthopaedic Surgery, Orthopedic Surgery +9