Relationship between Coronary Artery Calcium Score and Coronary Stenosis

Table 2

Different cutoff values of a calcium score to detect coronary stenosis ≥50% and ≥70%.

CACS cutoff value	Percentage of stenosis	Number (%) of patients	Sensitivity (%)	Specificity (%)	PPV (%)	NPV (%)	Accuracy (%)
0	≥50	16 (7.6)	9.6	61.9	50	14.8	20.2
	≥70	10 (4.8)	7.9	73.2	31.3	34.1	33.7
≥1	≥50	147 (70.0)	89.2	40.5	85.5	486	79.3
	≥70	114 (54.3)	90.5	28	65.9	65.7	65.9
≥30	≥50	122 (58.1)	74.1	57.1	87.2	35.8	70.7
	≥70	95 (45.2)	75.4	43.9	67.4	53.7	63
≥50	≥50	111 (52.9)	67.5	69	89.6	34.9	67.8
	≥70	86 (41.0)	68.3	52.4	68.8	51.8	62
≥100	≥50	98 (46.7)	59.6	76.2	90.8	32.3	63
	≥70	77 (36.6)	61.1	61	70.6	50.5	61.1
≥200	≥50	75 (35.7)	45.8	85.7	82.7	28.6	53.8
	≥70	61 (29.0)	48.4	74.4	74.4	48.4	58.7
≥300	≥50	56 (26.7)	34.3	95.2	96.6	26.8	46.6
	≥70	47 (22.4)	37.3	85.4	79.7	47	56.3
≥400	≥50	44 (21.0)	27.1	95.2	95.7	24.8	40.9
	≥70	38 (18.1)	30.2	89	80.9	45.3	53.4
≥1000	≥50	13 (6.2)	7.8	97.6	92.9	21.1	26
	≥70	10 (4.8)	7.9	95.1	71.4	40.2	42.3
≥1300	≥50%	9 (4.3)	5.4	100	100	21.1	24.5
	≥70%	7 (3.3)	5.6	97.6	77.8	40.2	41.8
≥1800	≥50%	2 (0.10)	1.2	100	100	20.4	21.2
	≥70%	2 (0.10)	1.6	100	100	39.8	40.9