LAUSR

To identify risk factors for endogenous endophthalmitis (EE) in hospitalized adults, under 65 years of age, with a history of intravenous opioid use and non-ocular infection. The National Inpatient Sample Database was used to identify cases of EE with a recent history of intravenous opioid use disorder with associated non-ocular infection. Systemic and ocular comorbidities were identified using codes from the International Classification of Diseases, Ninth Revision (ICD-9). Descriptive and regression analyses were performed to evaluate the risk factors for EE using IBM SPSS 23. Of the 605,859 inpatients, 21–65 years age, who had a history of recent opioid-IVDU and an associated IVDU-associated systemic infection, 363 (0.1%) had EE. Systemic comorbidities such as diabetes mellitus, mitral valve disease, aortic valve disease, history of cardiac valve transplantation, chronic kidney disease/renal failure, cirrhosis, active or previous radiation therapy, and history of solid organ transplantation were significantly more prevalent in patients with EE. A significantly increased risk of EE in intravenous opioid users was noted if they were of male gender (OR = 1.84), Asian/Pacific Islander ethnicity (OR = 4.41), had history of cirrhosis (OR = 2.33), active or history of radiation therapy (OR = 14.74), history of solid organ transplantation (OR = 5.91), candidemia (OR = 15.22), and infectious endocarditis (OR = 4.83). Conversely, concurrent alcohol use disorder (OR = 0.35) decreased the risk of EE. Various demographic variables and systemic comorbidities increased the risk of developing EE in inpatients with a history of intravenous opioid use with associated non-ocular infection.