Figure 1.

Acute poisonings treated at three health care levels in Oslo during one year. In total, there were 3757 health service contacts (3774 including double contacts the same day) from 2997 poisoning episodes by 2298 individuals. *From the 525 transfers between the ambulances and the hospitals, 15 went to hospitals outside Oslo, 15 had missing identity, 98 were not included in the study at the hospitals for various reasons and 397 were included in the study at the receiving hospital. **From the 570 transfers between ambulances and the outpatient clinic, 54 had missing identity, 249 were not included in the study at the outpatient clinic for various reasons and 267 were included in the study at the outpatient clinic. ***From the 155 transfers between the outpatient clinic and the hospitals, 19 went to hospitals outside Oslo, two had missing identity, 38 were not included in the study at the hospitals for various reasons and 96 were included in the study at the receiving hospital.