Correlation between the warning symptoms and prognosis of cardiac arrest

Table 3 Warning symptoms in patients with sudden cardiac arrest

Symptom, n (%)	Sex			Age			Etiology			Outcome
	Male (n = 460)	Female (n = 213)	P value	< 60 yr (n = 225)	≥ 60 yr (n = 448)	P value	Cardiac (n = 264)	Noncardiac (n = 409)	P value	Survival to discharge (n = 62)	Death to discharge (n = 611)	P value
Dyspnea	211 (45.9)	117 (54.9)	0.029a	101 (44.9)	227 (50.7)	0.157	110 (41.7)	218 (53.3)	0.003a	27 (43.5)	301 (49.3)	0.391
Chest pain	96 (20.9)	27 (12.7)	0.011a	50 (22.2)	73 (16.3)	0.061	117 (44.3)	6 (1.5)	< 0.001a	21 (33.9)	102 (16.7)	0.001a
Unconsciousness	67 (14.6)	35 (16.4)	0.530	38 (16.9)	64 (14.3)	0.374	19 (7.2)	83 (20.3)	< 0.001a	8 (12.9)	94 (15.4)	0.604
Paralysis	23 (5.0)	6 (2.8)	0.195	9 (4.0)	20 (4.5)	0.780	3 (1.1)	26 (6.4)	0.001a	3 (4.8)	26 (4.3)	0.829
Vomiting	20 (4.3)	7 (3.3)	0.514	7 (3.1)	20 (4.5)	0.399	5 (1.9)	22 (5.4)	0.025a	1 (1.6)	26 (4.3)	0.312
Abdominal pain	10 (2.2)	8 (3.8)	0.237	4 (1.8)	14 (3.1)	0.307	2 (0.8)	16 (3.9)	0.013a	0 (0.0)	18 (2.9)	0.171
Seizure	13 (2.8)	2 (0.9)	0.123	6 (2.7)	9 (2.0)	0.586	3 (1.1)	12 (2.9)	0.123	2 (3.2)	13 (2.1)	0.577
Dysphonia	6 (1.3)	7 (3.3)	0.082	4 (1.8)	9 (2.0)	0.837	1 (0.4)	12 (2.9)	0.019a	0 (0.0)	13 (2.1)	0.246
Palpitation	8 (1.7)	2 (0.9)	0.425	3 (1.3)	7 (1.6)	0.817	4 (1.5)	6 (1.5)	0.960	0 (0.0)	10 (1.6)	0.310
Dizziness	4 (0.9)	1 (0.5)	0.574	2 (0.9)	3 (0.7)	0.755	0 (0.0)	5 (1.2)	0.071	0 (0.0)	5 (0.8)	0.475
Syncope	1 (0.2)	1 (0.5)	0.576	0 (0.0)	2 (0.4)	0.316	0 (0.0)	2 (0.5)	0.255	0 (0.0)	2 (0.3)	0.652
Headache	1 (0.2)	0 (0.0)	0.496	1 (0.4)	0 (0.0)	0.158	0 (0.0)	1 (0.2)	0.421	0 (0.0)	1 (0.2)	0.750

^aP < 0.05.