Characteristic DNS children (N = 7; 10.3%) Non DNS children (N = 61; 89.7%) P value
Case Number (%) mean ± SD Case Number (%) mean ± SD
Age 7.86 ± 5.34 8.19 ± 4.48 0.887
Sex (male) 3 (42.9%) 33 (50.8%) 1.000
Events      
Fire accident 1 (14.3%) 0 (0.0%) 0.103
Intention 1 (14.3%) 2 (3.3%) 0.282
Heater in poorly ventilated indoor 5 (71.4%) 51 (83.6%) 0.598
Charcoal 2 (28.6%) 2 (3.3%) 0.050
Clinical presentation      
Dizziness 1 (14.3%) 41 (67.2%) 0.011
Headache 1 (14.3%) 24 (39.3%) 0.248
Nausea/vomiting 2 (28.6%) 21 (34.4%) 1.00
Chest discomfort 0 (0.0%) 4 (6.6%) 1.00
Mental change 7 (100%) 21 (34.4%) 0.001
GCS 10.14 ± 4.91 14.56 ± 1.74 <0.001 
LabLaboratory findings      
COHb 26.71 ± 12.48 21.54 ± 9.21 0.338
MetHb 0.85 ± 0.29 0.41 ± 0.21 0.001
WBC 12842 ± 5009 11357 ± 4209 0.437
Troponin I 3.52 ± 6.57 0.24 ± 0.36 0.009
CPK 1555.8 ± 1421.4 95.82 ± 58.72 0.002
Acidosis 2 (28.6%) 0 (0.0%) <0.001
Neuroimaging abnormalities 4 (57.1%) 1 (1.6%) <0.001
Intubation 1 (14.3%) 1 (1.6%) 0.197
Only NBO 1 (14.3%) 33 (54.1%) 0.105
HBO 5 (71.4%) 20 (32.8%) 0.091
Candidate for HBO* 7 (100%) 34 (55.7%) 0.167
Inadequate HBO 2 (33.3%) 21 (58.3%) 1.000
DNS indicates delayed neuropsychological sequelae; SD, standard deviation; GCS, Glasgow coma scales; NBO, normal baric oxygen; HBO, hyperbaric oxygen; Candidate for HBO*, initial COHb>25%, mental change, or myocardial injury.
Table 2: Clinical profiles of patients with and without delayed neuropsychological sequelae