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American Journal of Roentgenology, Vol 105, 853-859, Copyright © 1969 by American Roentgen Ray Society

A STUDY OF INTER- AND INTRA-OBSERVER ERROR IN READING PLAIN ROENTGENOGRAMS OF THE HANDS

"TO ERR IS HUMAN"

JOHN H. BLAND M.D.1, A. BRADLEY SOULE M.D.2, FREDERICK W. VANBUSKIRK M.D.3, ESTELLE BROWN B.S.4, and RUTH V. CLAYTON 5

1 Associate Professor of Medicine; Director, Rheumatology Unit; Department of Medicine
2 Professor and Chairman, Department of Radiology
3 Associate Professor of Radiology
4 Statistician, Department of Medicine (Rheumatology Unit)
5 Clinical Assistant, Department of Medicine (Rheumatology Unit)

A rheumatologist and 2 radiologists read 3 groups of 50 pairs of roentgenograms of patients' hands, one roentgenogram with and one without a comparator set of bones.

The categories were: Group I—normal subjects; Group II—surgical patients; and Group III—rheumatoid arthritis patients. They were matched for age and sex.

All readers had the same degree of observer error; comparator bones did not aid in the diagnosis of osteoporosis, rheumatoid arthritis or osteoarthritis; knowledge of the diagnosis influenced all observers' readings.


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Copyright © 1969 by the American Roentgen Ray Society.