Table 1.
Univariate analysis of variables of 258 patients of COP with delayed neuropsychiatric sequelae (DNS).
| Variable | DNS− | DNS+ | All | P value |
|---|---|---|---|---|
| (n = 245) | (n = 13) | (n = 258) | ||
| Age (mean ± SD) | 54.4 ± 22.4 | 63.6 ± 22.3 | 54.9 ± 22.4 | 0.184 |
| Age > 35 years (%) | 71.2 | 84.6 | 79.5 | 1.000 |
| Elderly (Age ≥ 65 years) (%) | 32.7 | 53.8 | 33.7 | 0.136 |
| Gender: male (%) | 47.2 | 61.5 | 48.0 | 0.397 |
| Systolic blood pressure (mean ± SD) | 129.5 ± 22.1 | 136.7 ± 23.1 | 129.9 ± 22.1 | 0.293 |
| Heart rate (mean ± SD) | 87.1 ± 17.0 | 88.5 ± 13.7 | 87.2 ± 16.9 | 0.767 |
| Respiratory rate (mean ± SD) | 20.3 ± 2.3 | 21.0 ± 3.3 | 20.3 ± 2.4 | 0.287 |
| Body temperature (mean ± SD) | 36.6 ± 0.5 | 36.7 ± 0.9 | 36.6 ± 0.6 | 0.758 |
| Occupational exposure (%) | 12.7 | 23.1 | 13.2 | 0.389 |
| Current smoker (%) | 12.2 | 23.1 | 12.8 | 0.223 |
| Hypertension history (%) | 18.8 | 38.5 | 19.8 | 0.143 |
| Diabetes history (%) | 4.1 | 7.7 | 4.3 | 0.440 |
| Ischemic stroke history (%) | 5.7 | 23.1 | 6.6 | 0.045 |
| Altered mental status (%) | 33.8 | 61.5 | 35.3 | 0.069 |
| Loss of consciousness (%) | 61.2 | 84.6 | 62.4 | 0.140 |
| Headache (%) | 41.2 | 30.8 | 40.7 | 0.569 |
| Dizziness (%) | 57.6 | 30.8 | 56.2 | 0.083 |
| Nausea or vomiting (%) | 36.7 | 46.2 | 37.2 | 0.561 |
| Lack of pupil reflex (%) | 10.2 | 7.7 | 10.1 | >0.95 |
| Positive Babinski reflex (%) | 11.4 | 53.8 | 13.6 | <0.001 |
| Incontinence (%) | 23.7 | 38.5 | 24.4 | 0.316 |
| Hyperbaric oxygen therapy (%) | 79.3 | 69.2 | 78.7 | 0.483 |
COP: carbon monoxide poisoning; SD: standard deviation.