Establishment of a prediction model for prehospital return of spontaneous circulation in out-of-hospital patients with cardiac arrest

Figure 1 Factor selection of prehospital return of spontaneous circulation via least absolute shrinkage and selection operator regression. A: Least absolute shrinkage and selection operator coefficient profiles of the 17 features. A coefficient profile plot was conducted against the log (lambda, λ) sequence; B: Through 10-fold cross-validation, and the optimal parameter (lambda, λ) selection via the minimum criteria. A partial likelihood deviance (binomial deviance) curve was plotted versus log λ. The dotted vertical line on the right was drawn at lambda.1se and four features were selected.