Background: Epidemiologic studies have shown that undocumented immigrants (UIs) display characteristics of having a low socioeconomic status and are primarily of ethnic minorities. These social determinants of health are known to be associated with diminished health care access and poor clinical outcomes. We therefore investigated the impact of documentation status on the clinical outcomes of patients with traumatic injuries.
Materials and methods: We conducted a retrospective review of the trauma registry at our safety net institution for all adult patients who were admitted from 2010 to 2014. UIs were identified by the absence of a valid social security number within their medical records. Multivariate regression analysis was used to determine the impact of documentation status on in-hospital mortality, length of stay (LOS), and the odds of rehab placement.
Results: 4924 trauma patients met the study criteria, of which 1050 (21.3%) were UIs. There was no significant difference in mortality rates between the two populations. Multivariate regression analyses revealed a longer average LOS and a decreased likelihood for placement in an in-patient rehabilitation facility following hospitalization for UIs, even after accounting for insurance, age, injury severity, and other possible confounders known to affect these outcomes.
Conclusions: There was no association between in-hospital mortality and documentation status; however, UIs had a longer average LOS and were less likely to be placed into rehab following their hospitalization. A longer LOS and a decreased likelihood for rehabilitation placement suggest that disparities in trauma care exist for UIs, putting them at risk for worse clinical and functional outcomes.
Keywords: Social determinants of health; Socioeconomic disparities; Trauma; Undocumented immigrants.
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