Figure 5From: Does recurrent laryngeal nerve lymph node metastasis really affect the prognosis in node-positive patients with squamous cell carcinoma of the middle thoracic esophagus? Survival curves of patients with different N stages (N0 vs. N1, P < 0.001; N0 vs. N2, P < 0.001; N0 vs. N3, P < 0.001; N1 vs. N2, P = 0.869; N1 vs. N3, P < 0.001; N2 vs. N3, P < 0.001). Back to article page