Table 4.

Validity of randomisation, sample 1 versus sample 2, and performance by SDA among patients with OHCA with non-cardiac origin

CPC proportions				SDA performance
				d′			AUC-ROC
Subgroup 1 (%)	Subgroup 2 (%)	Subgroup 3 (%)	Subgroup 4 (%)	Bystander rescue breathing	Eye-witnessed	Age 5–12 years	c-statistics	(95% CI)	p Value
Sample 1
38.5	9.3	8.0	4.0	0.69	0.69	1.11	0.73	(0.66 to 0.79)	<0.0001
Sample 2
21.7	16.6	28.3	3.0	1.03	0.30	–0.21	0.66	(0.58 to 0.74)	<0.0001
Total
29.4	13.0	21.1	3.5	0.87	0.47	0.26	0.70	(0.65 to 0.75)	<0.0001

Cochran-Mantel-Haenszel test: p=0.86.

Subgroup 1: witnessed OHCA by a bystander and rescue breathing and with 5–12 years old; 2: not witnessed OHCA by a bystander and received rescue breathing; 3: witnessed OHCA by a bystander and received rescue breathing and in the age of 13–17 years; 5: not received rescue breathing.

AUC-ROC, area under the curve in receiver operating curve; CPC, cerebral performance category; OHCA, out-of-hospital cardiac arrest; SDA, signal detection analysis.