Table 1.

Features and output definitions of CAD systems used in this study ¹.

System	A	B
Any abnormality	-	Numerical: 0–100; Categorical: TB or other abnormalities (including silicosis) present vs. absent (CXR normal).
TB	Numerical: 0–100; Categorical: TB present vs. absent.	Numerical: 0–100; Categorical: TB present vs. absent.
Silicosis	Numerical: 0–100; Categorical: silicosis present vs. absent	-
Silicotuberculosis (calculated)	Numerical: 0–100 (Sum TB, silicosis scores)/2; Categorical: silicotuberculosis present vs. absent	-

^1. Cutpoint for categorical analysis chosen from receiver operating characteristic curve (see text).