The Guy's Stone Score—Grading the Complexity of Percutaneous Nephrolithotomy Procedures

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

Classification of Surgical Complications

Daniel Dindo, Nicolas Demartines, Pierre-Alain Clavien · Annals of Surgery · 2004 · 30.9K citations · Full text

Medicine, Surgery, General Surgery +13

POSSUM: A scoring system for surgical audit

G P Copeland, Daryl Jones · British journal of surgery · 1991 · 1.7K citations

Medicine, Surgery, General Surgery +16

New classification of physical status

R B Dripps · Anesthesiology · 1963 · 1.7K citations

Health Professions, Physical Medicine, Clinical Classification Systems +12

Coefficient Kappa: Some Uses, Misuses, and Alternatives

Robert L. Brennan, Dale J. Prediger · Educational and Psychological Measurement · 1981 · 1.5K citations · Full text

Education, Educational Measurement, Item Response Theory +16