NIOSHTIC-2 Publications Search
The "middling" tendency.
Morgan-WK; Petersen-MR; Reger-RD
Arch Environ Health 1974 Dec; 29(6):334-337
A possible source of bias in the interpretation of chest films for pneumoconiosis is studied in the light of the UICC/ILO classification of pneumoconiosis into three subcategories. Theoretically, the percentage of subjects with the major categories of simple pneumoconiosis decreases with increasing category, and the percentage of subjects with each subcategory declines as one proceeds up the scale from 0/0 to 3/4. But in practice the phenomenon is not seen and more subjects are placed in the middle subcategories owing to the "middling" tendency.
NIOSH-Author; Radiography; Nosology; Respiratory-system-disorders; Chest-x-rays; Diagnostic-techniques
Issue of Publication
Archives of Environmental Health
Page last reviewed: April 12, 2019
Content source: National Institute for Occupational Safety and Health Education and Information Division