EGFR and neoplasm: Univariate analysis with Chi-square test (categorical predictors) and Wilcoxon test (continuous predictors) showed that sex (p = 0.035), smoking status (p = 0.027), pathological tumor type (p = 0.031), age (p = 0.026), tumor location (p = 0.012) and EGFR mutation status (p = 0.018) were statistically associated with the different failure patterns.