Figure 2. Association of Survival With Adjuvant Chemotherapy Based on the Presence of High-Risk Pathologic Features or Sublobar Resection in Patients Stratified by the 4 Tumor Size Categories or Stages.

Overall refers to all comers in the size category irrespective of high-risk features; high-grade indicates poor differentiation or undifferentiated. HR indicates hazard ratio; LVI, lymphovascular invasion; and VPI, visceral pleural invasion.

^aFor sublobar surgery, a larger cohort from 2004 to 2015 was used to increase power.