This analysis used administrative hospital datasets to evaluate outcomes for patients with necrotizing soft tissue infection (NSTI) who were transferred between hospitals. Investigators queried the Healthcare Cost and Utilization Project (HCUP) State Inpatient Databases (SID) and State Emergency Department Databases (SEDD) for Massachusetts, Wisconsin, and Colorado for the year 2022. The sample included 243 transferred NSTI patients identified within those state databases.
Mean patient age in the cohort was 56.7 years (SD 14.5), and 74 patients (30.5%) were female. Patients were transferred from 127 referring hospitals to 52 receiving centers, and the authors observed wide variation in referring hospital case volume and in the rate of operation performed prior to transfer.
Within the cohort, the subset undergoing an operation before transfer is referred to as PRE. Seventy-seven patients (31.7% of the transferred cohort) underwent PRE. The abstract reports that rates of severe sepsis or septic shock were similar between PRE patients and those who did not undergo a pre-transfer operation (41.6% vs. 37.4%, p = 0.531), indicating comparable apparent acuity by that metric at the time of coding.
The dataset captured basic demographics, comorbidity burden via the Charlson comorbidity index (CCI), and markers of acuity including coding for severe sepsis or septic shock. The cohort was drawn from multiple referring and receiving hospitals across three states, reflecting heterogeneous practice patterns and facility volumes. The abstract does not provide more granular clinical details such as timing from symptom onset to presentation, anatomic distribution of infection, specific operative procedures, microbiology, or physiologic scores beyond the variables listed for risk adjustment.
The prespecified primary outcome was in-hospital mortality. Unadjusted mortality was 9.1% for patients who had PRE (7 of 77) compared with 6.0% for patients who did not have a pre-transfer operation (10 of 166). Multivariable logistic regression was performed adjusting for demographics, weekend transfer, presence of severe sepsis or septic shock, and Charlson comorbidity index. The adjusted odds ratio (aOR) for mortality associated with PRE was 1.62; this finding did not reach statistical significance (p = 0.38). In the cohort and with the covariates reported, the authors therefore observed no association between undergoing a pre-transfer operation and improved mortality among transferred NSTI patients.
Secondary outcomes included hospital length of stay (LOS) and hospital charges. PRE patients had longer stays at the referring hospital (median 4 vs. 0 days, p < 0.001) and longer post-transfer stays at the receiving hospital (median 15 vs. 10 days, p = 0.01). Healthcare charges were substantially higher for PRE patients both before transfer (median $66,214.50 vs. $11,227.50, p < 0.001) and after transfer (median $161,615 vs. $89,728, p = 0.012). These differences in LOS and charges were statistically significant as reported in the abstract.
Among transferred patients with necrotizing soft tissue infection, undergoing a pre-transfer operation was not associated with lower in-hospital mortality after adjustment for selected covariates. Instead, PRE patients experienced longer hospital stays and incurred higher hospital charges both at the referring site and after transfer to the receiving center. The authors suggest these differences may reflect worse underlying physiology or more complex wounds among patients who underwent PRE, although the administrative dataset and abstract do not provide granular clinical data to confirm those explanations.
Clinical interpretation should consider that this study used state administrative databases (HCUP SID and SEDD) and an observational design, which limits ability to infer causation and to adjust for unmeasured confounders such as timing of diagnosis, extent of tissue involvement, specific surgical procedures, and physiologic severity scores beyond coding for sepsis. The abstract does not report additional subgroup analyses or sensitivity testing.
Overall, the reported findings indicate that in this multicenter administrative cohort of transferred NSTI patients from three states in 2022, pre-transfer debridement did not confer a mortality benefit and was associated with increased length of stay and charges; further prospective or more granular observational work would be required to determine optimal timing and setting for operative management of NSTI among patients requiring transfer.