Table 4.

Number of nodules described by CAD, radiologist and the interobserver reliability for each category of diseases.

CT Findings n = 481/479	CAD n(%)	Radiologist n(%)	CAD vs. Radiologist κ Agreement
Rheumatoid nodules	188 (39.08%)	185 (38.62%)	0.433 Moderate
Primary malignancy	21 (4.36%)	20 (41.75%)	0.636 Substantial
Metastasis	257 (53.34%)	256 (54.35%)	0.455 Moderate
Benign	15 (3.11%)	18 (3.75%)	0.474 Moderate
Overall	481	479	0.478 Moderate

CAD = computer-aided diagnosis.