Table 1. Demographic data of the study cohort.

Characteristics	Overall, intoxication n = 20,371	Severe intoxication n = 1,916	Non-severe intoxication n = 18,455	p value
Patient Characteristics
Age, years–median (IQR)	44 (33–58)	53 (38–72)	43 (32–57)	< .0001
Male (%)	44.0	54.3	42.9	< .0001
Hospital Levels				0.2690
Medical centers	26.1	24.5	26.2
Regional hospitals	46.2	52.0	45.6
Local hospitals	27.7	23.5	28.1
Inter-hospital transfer	10.7	36.0	8	< .0001
Socioeconomic status: monthly income (US Dollars), %				. < .0001
Dependent	20.8	23.9	20.5
< 667	31.6	35.9	31.2
667–1334	37	36.1	37.1
> 1334	10.6	4.2	11.2
Medical history (%)
Hypertension	18.0	29.3	16.9	< .0001
Diabetes mellitus	9.9	17.6	9.1	< .0001
Ischemic heart disease/heart failure	10.8	21.5	9.7	< .0001
Malignancy	2.8	4.7	2.6	< .0001
Obstructive lung disease	3.9	7.9	3.5	< .0001
Cerebrovascular disease	0.4	0.9	0.4	0.0212
Liver disease	7.4	10.3	7.1	< .0001
Chronic renal disease	1.7	4.3	1.4	< .0001
Psychiatric illness	34.2	40.5	33.6	< .0001
Prior intoxication†	4.6	6.2	4.4	0.0026

† defined as previous relative ICD9 or antidote use in 1 year.