Lucky number 13: Association between center-specific chest wall stabilization volumes and patient outcomes

Analysis of 2019 TQIP data shows a favorable volume-outcome relationship at centers that performed chest wall stabilization. We identified a cut point of 13 annual surgeries per center to be associated with improved outcomes regardless of trauma center designation BACKGROUND Chest wall stabilization (CWS) improves outcomes for patients with chest wall injury (CWI). We hypothesized that patients treated at centers with higher annual CWS volumes experience superior outcomes. METHODS A retrospective study of adults with acute CWI undergoing surgical stabilization of rib or sternal fractures within the 2019 Trauma Quality Improvement Program database, excluding those with 24-hour mortality or any Abbreviated Injury Scale body region of six, was conducted. Hospitals were grouped in quartiles by annual CWS volume. Our primary outcome was a composite of in-hospital mortality, ventilator-associated pneumonia, acute respiratory distress syndrome, sepsis, and unplanned intubation or intensive care unit readmission. Regression was controlled for age, sex, Injury Severity Scale, flail chest, medical comorbidities, and Abbreviated Injury Scale chest. We performed cut-point analysis and compared patient outcomes from high- and low-volume centers. RESULTS We included 3,207 patients undergoing CWS at 430 hospitals with annual volumes ranging from 1 to 66. There were no differences between groups in age, sex, or Injury Severity Scale. Patients in the highest volume quartile (Q4) experienced significantly lower rates of the primary outcome (Q4, 14%; Q3, 18.4%; Q2, 17.4%; Q1, 22.1%) and significantly shorter hospital and intensive care unit lengths of stay. Q4 versus Q1 had lower adjusted odds of the primary outcome (odds ratio, 0.58; 95% confidence interval, 0.43–0.80). An optimal cut point of 12.5 procedures annually was used to define high- and low-volume centers. Patients treated at high-volume centers experienced significantly lower rates of the primary composite outcome, in-hospital mortality, and deep venous thrombosis with shorter lengths of stay and higher rates of home discharge. CONCLUSION Center-specific CWS volume is associated with superior in-hospital patient outcomes. These findings support efforts to establish CWI centers of excellence. Further investigation should explore the impact of center-specific volume on patient-reported outcomes including pain and postdischarge quality of life. LEVEL OF EVIDENCE Prognostic and Epidemiologic; Level III.