Site: Portland, Oregon

Participating Hospital: Oregon Health and Science University (OHSU)

Case Definition: Hospital visits involving a patient aged 18 years or older presenting to the emergency department with a complaint of overdose and/or any ICD 10-CM T36-T50 initial encounter diagnosis code of poisoning with accidental (unintentional), intentional self-harm, or undetermined intent. Only includes visits with initial encounter ICD-10-CM diagnosis codes of T36–T50 with a sixth character of 1, 2, or 4 (exceptions for T36.9, T37.9, T39.9, T41.4, T42.7, T43.9, T45.9, T47.9, and T49.9, which were included if the code had a fifth character of 1, 2, or 4) and a seventh character of “A” (initial encounter).

Any ED Visit with an overdose term reported in any complaint field was included in the dataset; the following terms were considered valid overdose terms: “intentional overdose”; “OD – Overdose”; and “SI/OD”. Any ED Visit with a Naloxone term reported in any complaint field would also be included in the dataset; however, no Naloxone terms were reported for this site.

Note that persons who visit the ED multiple times are counted each time as a separate visit.

EHR Case Information Provided to EDDS: Arrival date (month/year), departure date (month/year); ED disposition, patient complaint(s), diagnose(s) and ICD-10-CM diagnostic code(s), age, race/ethnicity, sex, zip code, and, when available, COVID-19 test results; and urine drug screen results for 8 drugs (drug  (i.e.., Amphetamines, Barbiturates, Benzodiazepines, Cannabinoids (THC), Cocaine, Methadone, Opiates, and Oxycodone).

Data Collection Beginning: January 2011

Data Collection Frequency: Quarterly