Table 3.

Base-line characteristics of patients and association between variables and DNS development

Variables (before or upon ED admission)	Patient number = 141 mean ± SD	Non-DNS group at one month from hospital discharge (patient n = 107) mean ± SD	DNS group at one month from hospital discharge (patient n = 34) mean ± SD	p value
Age (years)	42 ± 21	41.7 ± 21.7	40.4 ± 15.5	>.05
Sex (male)	64 (45.3%)	53 (49.5%)	11 (32.3%)	>.05
Duration of exposure >6 hours	54 (38.2%)	36 (33.6%)	18 (52.9%)	.03
Suicide attempt	5 (3.5%)	3 (2.8%)	2 (5.8%)	>.05
Hb (g/dL)	14 ± 1.6	14.1 ± 1.16	13.7 ± 1.9	>.05
WBC (per microlitre)	9.87 ± 3.7	9.100 ± 2.900	11.900 ± 4.900	.004
Plt (per microlitre)	234.300 ± 58.300	236.000 ± 61.700	228.000 ± 47.000	>.05
Troponin I (ng/mL) (n = 43)	0.72 ± 3.25	0.88 ± 3.88 (n = 30)	0.33 ± 0.66 (n = 13)	>.05
CPK (U/L) (n = 127)	255 ± 763	159 ± 221 (n = 97)	572 ± 1506 (n = 30)	.01
Lactate (mmol/L) (n = 82)	1.77 ± 1.46	1.77 ± 1.41 (n = 62)	1.76 ± 1.34 (n = 20)	>.05
pH	7.41 ± 0.07	7.40 ± 0.07	7.41 ± 0.07	>.05
paCO2 (KPa)	4.78 ± 0.87	4.82 ± 0.89	4.62 ± 0.74	>.05
paO2 (KPa)	15.33 ± 1.09	14.93 ± 7.34	16.53 ± 10.45	>.05
GCS <9	15 (10.6%)	6 (5.6%)	9 (26.4%)	.002
Transient loss of consciousness	75 (53.1%)	53 (49.5%)	22 (64.7%)	>.05
Seizures	14 (9.9%)	5 (4.6%)	9 (26.4%)	.001
Systolic blood pressure <90 mmHg	4 (2.8%)	1 (0.9%)	3 (8.8%)	.04
Postural instability	37 (26.2%)	26 (24.2%)	11 (32.3%)	>.05
Headache	79 (56%)	60 (56%)	19 (55.8%)	>.05
GCS between 14 and 9	29 (20.5%)	26 (24.2%)	3 (8.8%)	>.05
Severe metabolic acidosis (pH <7.2)	11 (7.8%)	6 (5.6%)	5 (14.7%)	>.05
Dyspnea	6 (4.2%)	4 (3.7%)	2 (5.8%)	>.05
Mean carboxyhemoglobin level at admission (%)	26.3 ± 10	26 ± 10.2	26.4 ± 10.5	>.05
Evidence of myocardial injury	33 (23.4%)	23 (21,4%)	10 (29,4%)	>.05
HBO therapy	55 (39%)	44 (41.1%)	11 (32.3%)	>.05

141/347 (40,6%) patients participated in the follow-up visit at one month from hospital discharge.