Predictive Value of Gray-Matter–White-Matter Ratio on Brain Computed Tomography for Delayed Encephalopathy after Acute Carbon Monoxide Poisoning: A Retrospective Cohort Study
Table 1
General characteristics upon arrival of the study group.
DEACMP group ()
Non-DEACMP group ()
Age (years)
60.50 (15.00)
59.00 (22.00)
0.343
Gender (male/female)
8/8
146/190
0.606
Heart rate (beats/min)
96.50 (22)
86.00 (20.00)
0.060
Respiration rate (breaths/min)
20.00 (3.00)
18.50 (2.00)
0.003
Mean arterial pressure (mmHg)
98.50 (14.00)
97.00 (19.00)
0.407
Duration of CO exposure (h)
8.84 (2.13)
4.00 (5.25)
<0.001
Time from end of exposure to admission (h)
3.77 (2.20)
3.51 (1.90)
0.363
Time from end of exposure to brain CT (h)
3.00 (1.98)
2.46 (1.45)
0.092
Hyperbaric oxygen therapy (yes/no)
14/2
267/69
0.434
Number of hyperbaric oxygen therapy sessions
10 (12)
6 (8)
0.038
Alanine aminotransferase (U/L)
20.80 (31.43)
16.10 (11.15)
0.082
Creatinine (μmol/L)
67.00 (29.75)
62.00 (23.00)
0.225
pH
7.40 (0.06)
7.40 (0.05)
0.611
PO2 (mmHg)
93.85 (54.83)
88.45 (40.03)
0.667
Base excess (mmol/L)
-4.45 (4.58)
-1.55 (3.40)
0.002
COHB (%)
29.35 (10.45)
28.20 (10.80)
0.721
GWR-basal ganglia
1.05 (0.07)
1.12 (0.06)
<0.001
GWR-cortices
1.04 (0.06)
1.11 (0.13)
0.002
GWR-average
1.06 (0.06)
1.10 (0.08)
<0.001
DEACMP: delayed encephalopathy after acute carbon monoxide poisoning; GWR: gray-matter–white-matter ratio; CO: carbon monoxide; COHB: carboxyhemoglobin. Data are expressed as the , median (interquartile range), or number of patients (percentage).
