Site: Newark, New Jersey

Participating Hospital: University Hospital (Newark, New Jersey)

Case Definition: Hospital visits involving a patient aged 18 years or older presenting to the emergency department with either 1) an ICD-10-CM T36-50 diagnosis code (any intent or encounter type) AND a complaint of “Drug Overdose“; or 2) an ICD 10-CM T36-T50 initial encounter diagnosis code of poisoning with accidental (unintentional), intentional self-harm, or undetermined intent. Initial encounter with accidental/unintentional; intentional self-harm, or undetermined intent were defined as cases with T36–T50  ICD-10-CM  with a seventh character of “A” (initial encounter) and a  sixth character of  “1” (accidental/unintentional ); “2” (intentional self-harm); or “4” (undetermined)  (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”).

Any ED Visit with an overdose term reported in any complaint field was included in the dataset; the following term was considered a valid overdose term: “Drug Overdose”. 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 chief complaint(s), diagnose(s) and ICD-10-CM diagnostic code(s), age, race/ethnicity, sex, zip code of residence, and, when available, COVID-19 test results; and urine drug screen results for 8 drugs (i.e.., Amphetamines, Barbiturates, Benzodiazepines, Cannabinoids, Cocaine, Methadone, Opiates, and PCP).

Data Collection Beginning: January 2016

Data Collection Frequency: Quarterly