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Evaluating the complex association between Social Vulnerability Index and trauma mortality.
Pooja U Neiman1, Melanie M Flaherty, Ali Salim
1From the Department of Surgery (P.U.N., A.S.), Brigham and Women's Hospital, Boston, Massachusetts; Center for Healthcare Outcomes and Policy (P.U.N., N.F.S., A.I., Z.F., M.R.H., J.W.S.), National Clinical Scholars Program (P.U.N.), University of Michigan Medical School (M.M.F.), and Department of Surgery (A.I., M.R.H., J.W.S.), University of Michigan, Ann Arbor, Michigan.
The Journal of Trauma and Acute Care Surgery
|April 25, 2022
Summary
Social vulnerability impacts trauma patient outcomes, but this association disappears when accounting for injury severity. Improving trauma survival requires addressing upstream social and structural inequities.
Area of Science:
- Public Health
- Epidemiology
- Trauma Surgery
Background:
- Social determinants of health significantly influence patient outcomes but are challenging to quantify.
- The Centers for Disease Control and Prevention's Social Vulnerability Index (SVI) identifies community vulnerability using population data.
- The link between SVI and trauma patient outcomes remains unclear.
Purpose of the Study:
- To investigate the association between the Social Vulnerability Index (SVI) and inpatient mortality among adult trauma patients.
- To determine if SVI predicts trauma mortality independently of clinical factors.
Main Methods:
- A retrospective study merged SVI data with a statewide trauma registry.
- Three models were used: unadjusted, claims-based covariate adjustment, and National Trauma Data Standard registry-based covariate adjustment.
- 83,607 adult trauma admissions from January 2017 to September 2020 were analyzed.
Main Results:
- Higher SVI was initially associated with increased mortality (OR 1.72).
- This association weakened after adjusting for claims data covariates.
- No significant association between SVI and mortality remained after adjusting for robust clinical variables (aOR 1.10).
- Higher SVI correlated with increased likelihood of severe injuries and critical care needs.
Conclusions:
- While social vulnerability is linked to higher trauma mortality, this association is not significant after adjusting for injury severity and clinical factors.
- Findings suggest trauma mortality disparities stem from injury lethality, not differential treatment quality.
- Interventions targeting upstream social and structural inequities are crucial for improving trauma survival in vulnerable populations.
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