Descemet stripping automated endothelial keratoplasty (DSAEK) is a predominant surgical method of endothelial keratoplasty for treating corneal endothelial dysfunction.1 Prediction, variable selection, and determining factors associated with graft failure may lead to improved clinical decision-making guidelines and surgical outcomes of DSAEK. Survival data allow for time-to-event analysis, which can be defined as death, onset of disease, or the success or failure of procedures. The traditional statistical methods used to analyze survival data include Kaplan-Meier analysis for estimating the survival function, the log-rank test for 2-group comparisons, and the Cox proportional hazards regression model to determine associations between risk factors and the probability of survival.2 More recently, machine learning techniques have been used to expand our ability in including high-dimensional data with multiple features for predictions and variable selection. In this issue of JAMA Ophthalmology, O’Brien et al3 use data from the Cornea Preservation Time Study to apply a random survival forest (RSF), an ensemble tree method for analysis of right-censored survival data, as a method to select important variables that predict graft failure after DSAEK.
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Hallak JA. A Machine Learning Model With Survival Statistics to Identify Predictors of Descemet Stripping Automated Endothelial Keratoplasty Graft Failure. JAMA Ophthalmol. 2021;139(2):198–199. doi:10.1001/jamaophthalmol.2020.5741
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