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Table 4 CAD-RADS assessment categories between the two readers. The inter-observer agreement, computed with Cohen’s k statistics, was almost perfect for conventional standard categories and modifiers

From: Inter-observer agreement and image quality of model-based algorithm applied to the Coronary Artery Disease-Reporting and Data System score

CAD-RADS (n, %)

Reader 1

Reader 2

Agreement (k)

Standard categories (N = 160)

0

39 (24.4)

40 (25.0)

0.965

1

29 (18.1)

27 (16.9)

0.912

2

24 (15.0)

20 (12.5)

0.885

3

13 (8.1)

19 (11.9)

0.801

4A

17 (10.6)

21 (13.1)

0.810

4B

12 (7.5)

10 (6.2)

0.910

5

26 (16.3)

23 (14.4)

0.840

Modifiers (N = 42)

N

18 (42.8)

18 (42.8)

1.000

G

10 (23.8)

10 (23.8)

1.000

S

14 (33.4)

14 (33.4)

1.000

  1. N = non-diagnostic study, S = presence of stent, G = presence of graft