Development of a nomogram for overall survival in patients with esophageal carcinoma: A prospective cohort study in China

Figure 2 Variable selection by least absolute shrinkage and selection operator Cox regression model. A coefficient profile plot was produced against the log (lambda) sequence. A: 22 variables with nonzero coefficients were selected by optimal lambda; B: By verifying the optimal parameter (lambda) in the least absolute shrinkage and selection operator model, the partial likelihood deviance (binomial deviance) curve was plotted vs log (lambda) and dotted vertical lines were drawn based on 1 standard error criteria.