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Table 3: 
Predictive value of the SICH score
Score Retrospective-Derivation Cohort (n = 623) Prospective-Validation Cohort (n = 222) All Patients (n = 845)
No. (%) % Positive CTAs No. (%) % Positive CTAs No. (%) % Positive CTAs
0 37 (5.9) 0 15 (6.8) 0 52 (6.1) 0
1 145 (23.3) 1.4 67 (30.2) 1.5 212 (25.1) 1.4
2 209 (33.5) 5.3 68 (30.6) 4.4 277 (32.8) 5.1
3 138 (22.2) 18.1 40 (18.0) 20 178 (21.1) 18.5
4 61 (9.8) 39.3 21 (9.5) 38.1 82 (9.7) 39
5 28 (4.5) 85.7 10 (4.5) 80 38 (4.5) 84.2
6 5 (0.8) 100 1 (0.4) 100 6 (0.7) 100
AUC (95% CI) 0.86 (0.83–0.89) 0.87 (0.82–0.91) 0.87 (0.84–0.89)
MOP >2 >2 >2
Sensitivity 85.7 86.2 85.8
Specificity 71.1 75.6 72.3
P value <.0001 <.0001 <.0001

Score	Retrospective-Derivation Cohort (n = 623)		Prospective-Validation Cohort (n = 222)		All Patients (n = 845)
Score	No. (%)	% Positive CTAs	No. (%)	% Positive CTAs	No. (%)	% Positive CTAs
0	37 (5.9)	0	15 (6.8)	0	52 (6.1)	0
1	145 (23.3)	1.4	67 (30.2)	1.5	212 (25.1)	1.4
2	209 (33.5)	5.3	68 (30.6)	4.4	277 (32.8)	5.1
3	138 (22.2)	18.1	40 (18.0)	20	178 (21.1)	18.5
4	61 (9.8)	39.3	21 (9.5)	38.1	82 (9.7)	39
5	28 (4.5)	85.7	10 (4.5)	80	38 (4.5)	84.2
6	5 (0.8)	100	1 (0.4)	100	6 (0.7)	100
AUC (95% CI)		0.86 (0.83–0.89)		0.87 (0.82–0.91)		0.87 (0.84–0.89)
MOP		>2		>2		>2
Sensitivity		85.7		86.2		85.8
Specificity		71.1		75.6		72.3
P value		<.0001		<.0001		<.0001