The Effect of Self-Inflicted Burns on ABSI Score Prediction Power: a four-year prospective multicenter study of the German Burn Registry

Background: Suicide attempted by self-inflicted burns are associated with lower survival rates compared to accident related burns. Objective: We investigate the relation between self-inflicted burns (SIB) and survival rates and how this relation is moderated by variables used to predict survival rates in the ABSI score, a widely used measure. Additionally, we compare the predicted survival rates by the ABSI score to the actual rates in our sample for SIB and accident patients. Methods: In this prospective multicenter study data from the German Burn Registry are statistically analyzed using two sided t-test and multivariate linear regression models. Results: 5330 patients (214 with SIB) met our inclusion criteria. We find a 6.8 percentage points lower survival rate for patients with SIB when we control for patient condition with the five ABSI components as covariates. These higher mortality rates can be explained by the higher rate of therapy restrictions for patients with self-inflicted burns. Additionally, different ABSI modifications can improve the predictive power of the score. Conclusion: Patients with SIB have lower survival rates compared to accident patients. Recently proposed modifications of the ABSI score can improve the accuracy of survival rate prediction for SIB.

Billner, Moritz, Simon Reif and Bert Reichert (2022), The Effect of Self-Inflicted Burns on ABSI Score Prediction Power: a four-year prospective multicenter study of the German Burn Registry, Burns 48(7) , 1710-1718