Low agreement among 24 doctors using the Neer-classification; only moderate agreement on displacement, even between specialists

The Measurement of Observer Agreement for Categorical Data

J. Richard Landis, Gary G. Koch · Biometrics · 1977 · 78.9K citations · Full text

Public Health, Biostatistics, Categorical Data Analysis +12

Displaced proximal humeral fractures. I. Classification and evaluation.

Charles S. Neer · PubMed · 1970 · 2K citations

Medicine, Orthopaedic Surgery, Orthopedic Surgery +12

The epidemiology of proximal humeral fractures

Charles M. Court-Brown, Ashima Garg, Margaret M. McQueen · Acta Orthopaedica Scandinavica · 2001 · 883 citations

Medicine, Orthopaedic Surgery, Orthopedic Surgery +10

The Neer classification system for proximal humeral fractures. An assessment of interobserver reliability and intraobserver reproducibility.

Michael L. Sidor, Joseph D. Zuckerman, Thomas R. Lyon et al. · Journal of Bone and Joint Surgery · 1993 · 458 citations

Medicine, Orthopaedic Surgery, Orthopedic Surgery +15

The reproducibility of classification of fractures of the proximal end of the humerus.

Klaus A. Siebenrock, Christian Gerber · Journal of Bone and Joint Surgery · 1993 · 407 citations

Medicine, Orthopaedic Surgery, Orthopedic Surgery +14