Table 6.

Agreement in risk classification between (A) automatic, (B) manual and (c) visual assessment of LDCT scans and gold standard.

(A)
Automatic LDCT	Agatston score measured on CSCT
	0	1–10	11–100	101–400	400–1 000	> 1 000
0	12	9	14	4	0	0	39 (18.3%)
1–10	0	0	7	0	1	0	8 (3.8%)
11–100	0	0	6	16	7	0	29 (13.6%)
101–400	0	0	0	14	49	9	72 (33.8%)
401–1 000	0	0	0	0	12	34	46 (21.6%)
> 1 000	0	0	0	0	0	19	19 (8.9%)
	12 (5.6%)	9 (4.2%)	27 (12.7%)	34 (16.0%)	69 (32.4%)	62 (29.1%)	213

(B)
Manual LDCT	Agatston score measured on CSCT
	0	1–10	11–100	101–400	400–1 000	> 1 000
0	12	7	2	0	0	0	21 (9.9%)
1–10	0	2	13	2	0	0	17 (8.0%)
11–100	0	0	12	18	4	0	34 (16.0%)
101-400	0	0	0	14	49	4	67 (31.5%)
401–1 000	0	0	0	0	16	39	55 (25.8%)
> 1 000	0	0	0	0	0	19	19 (8.9%)
	12 (5.6%)	9 (4.2%)	27 (12.7%)	34 (16.0%)	69 (32.4%)	62 (29.1%)	213

(C)
Visual LDCT	Agatston score measured on CSCT
	0	1–10	11–100	101–400	400–1 000	> 1 000
0	12	5	1	1	0	0	19 (8.9%)
1–10	0	4	4	1	0	0	9 (4.2%)
11–100	0	0	20	8	0	0	28 (13.1%)
101–400	0	0	2	22	16	1	41 (19.2%)
401–1 000	0	0	0	2	53	14	69 (32.4%)
> 1 000	0	0	0	0	0	47	47 (22.1%)
	12 (5.6%)	9 (4.2%)	27 (12.7%)	34 (16.0%)	69 (32.4%)	62 (29.1%)	213

A: Weighted linear κ = 0.50 (95% CI 0.44–0.56)

B: Weighted linear κ = 0.58 (95% CI 0.52–0.63)

C: Weighted linear κ = 0.82 (95% CI 0.77–0.87)