marginally statistically significantP = 0.058
Survival curves demonstrated a significant difference in DFS between patients with N0 disease and N1 disease with only RLN metastasis ( P = 0.020), and marginally statistically significant differences in DMFS and DFS between N1 disease with only RLN metastasis and other N1 disease ( P = 0.058 and P = 0.091, respectively).