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Table 3 Base-line characteristics of patients and association between variables and DNS development

From: Delayed neuropsychological sequelae after carbon monoxide poisoning: predictive risk factors in the Emergency Department. A retrospective study

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

  1. 141/347 (40,6%) patients participated in the follow-up visit at one month from hospital discharge.