Fig. 2

Predictor selection using logistic LASSO regression. (A) Optimal parameter (lambda) selection in the LASSO regression was performed using tenfold cross-validation based on the minimum criteria. (B) LASSO coefficient profiles of all variables. A coefficient profile plot was generated against the log(lambda) sequence. A dotted vertical line indicates the value selected using tenfold cross-validation. Seven variables with nonzero coefficients were selected by the optimal lambda (using the 1-SE criteria). LASSO, least absolute shrinkage and selection operator