Single and Unhoused Population at Risk for Self-Inflicted Burn Injury: A Retrospective Analysis of an Urban American Burn Center's Experience.

Despite the growing recognition of self-harm as a pressing public health issue, demographic risk factors of self-inflicted burn (SIB) injuries in the U.S. have not been extensively described. In this retrospective study, we seek to identify demographic risk factors and patterns associated with SIB injuries at an urban burn center. Charts were reviewed of patients admitted to a single American Burn Association (ABA)-verified burn unit between 2015 and 2023 with a history of SIB injury, identified with ICD10 code X76.XXXA. Descriptive statistics, Welch's t-test of unequal variances, and Chi-Squared-analysis were performed. A total of 3,212 patients were admitted to our institution for management of acute burn injury, with 94 (2.9%) patients who presented with SIB injury. SIB patients were more likely than the control cohort to be male (p = 0.035), single (p=0.008), unhoused (p < 0.001), live alone (p < 0.001), and have documented psychiatric diagnoses (72.3% vs. 2.1%, p < 0.001). They had larger %TBSA affected (p < 0.001) and higher rates of inhalation injury (p < 0.001). The SIB cohort also showed significantly higher rates of positive urine toxicology results, primarily for stimulants and opiates (p < 0.001). Patients with SIBs had longer hospital stays (21.7 ± 2.6 days vs. 12.0 ± 22.1 days, p = 0.006), higher rates of ICU admission (p < 0.001), and mechanical ventilation requirement (p < 0.001). Mental health support services, substance abuse rehabilitation programs, and community outreach need to be prioritized, especially targeting vulnerable populations such as the unhoused.