Citation

Choi J, Marafino BJ, Vendrow EB, Tennakoon L, Baiocchi M, Spain DA, Forrester JD. J. Trauma Acute Care Surg. 2021; ePub(ePub): ePub.

Copyright

(Copyright © 2021, Lippincott Williams and Wilkins)

DOI

10.1097/TA.0000000000003390

PMID

unavailable

Abstract

BACKGROUND: Rib fractures are consequential injuries for geriatric patients (age ≥ 65 years). Although age and injury patterns drive many rib fracture management decisions, the impact of frailty-which baseline conditions affect rib fracture-specific outcomes-remains unclear for geriatric patients. We aimed to develop and validate the Rib Fracture Frailty (RFF) Index, a practical risk-stratification tool specific for geriatric patients with rib fractures. We hypothesized that a compact list of frailty markers can accurately risk stratify clinical outcomes after rib fractures.

METHODS: We queried nationwide US admission encounters of geriatric patients admitted with multiple rib fractures from 2016-2017. Partitioning-around-medoids clustering identified a development subcohort with previously-validated frailty characteristics. Ridge regression with penalty for multicollinearity aggregated baseline conditions most prevalent in this frail subcohort into RFF scores. Regression models with adjustment for injury severity, sex, and age assessed associations between frailty risk categories (low, medium, and high) and inpatient outcomes among validation cohorts (OR [95%CI]). We report results according to Transparent Reporting of Multivariable Prediction Model for Individual Prognosis guidelines.

RESULTS: Development cohort (N = 55,540) cluster analysis delineated thirteen baseline conditions constituting the RFF Index. Among external validation cohort (N = 77,710), increasing frailty risk (low [reference group], moderate, high) was associated with stepwise worsening adjusted odds of mortality (1.5[1.2-1.7], 3.5 [3.0-4.0]), intubation (2.4[1.5-3.9], 4.7[3.1-7.5]), hospitalization ≥5 days (1.4[1.3-1.5], 1.8[1.7-2.0]), and disposition to home (0.6[0.5-0.6], 0.4[0.3-0.4]). Locally weighted scatterplot smoothing showed correlations between increasing RFF scores and worse outcomes.

CONCLUSION: RFF Index is a practical frailty risk-stratification tool for geriatric patients with multiple rib fractures. The mobile app we developed may facilitate rapid implementation and further validation of RFF Index at the bedside. LEVEL OF EVIDENCE: level III, prognostic study.

Language: en