Table 2.
Prognostic performance of the 0/1-hour algorithm after 90 days
| Patients, n (%) | AMI index* | Total AMI 90 days† | Deaths 90 days | AMI + deaths 90 days‡ |
| Disposition after OAEOC | ||||
| Rule-out (n=1241) | 1 (0.1) | 2 (0.2) | 1 (0.1) | 3 (0.3) |
| Primary care | 1 | 2 | 1 | 3 |
| Hospital | 0 | 0 | 0 | 0 |
| Observation (n=320) | 15 (4.5) | 19 (5.7) | 4 (1.3) | 22 (6.9) |
| Primary care | 0 | 3 | 1 | 4 |
| Hospital | 15 | 16 | 3 | 19 |
| Rule-in (n=62) | 45 (68.2) | 45 (68.2) | 4 (6.4) | 45 (68.2) |
| Primary care | 0 | 0 | 0 | 0 |
| Hospital | 45 | 45 | 4 | 45 |
| Total (N=1623) | 61 (3.6) | 66 (4.1) | 9 (0.6) | 70 (4.3) |
The patients were divided into the 0/1-hour algorithm classification and disposition after OAEOC discharge. Time to first incident of AMI is reported, including index episode, in addition to all-cause death the following 90 days. Follow-up data were not available for 2019 due to technical data-extraction reasons from the national registries, shortening the follow-up period for the 53 patients recruited to the study in October 2018.
*AMI at index admission: total (N=1711); rule-out (n=1311); observation (n=334); rule-in (n=66).
†Including AMI at index.
‡Five patients with AMI subsequently died (four in the rule-in group and one in the observation group) and hence were not counted twice.
AMI, acute myocardial infarction; OAEOC, Oslo Accident and Emergency Outpatient Clinic.