Fig. 2
From: Increased resected lymph node stations improved survival of esophageal squamous cell carcinoma
Association of resected lymph nodes with hazard ratios for OS. Overall survival fitted by LOWESS stratified by ELN (A). The structural break point determined by the Chow test stratified by ELN (B). Overall survival fitted by LOWESS stratified by E-LNS (C). The structural break point determined by the Chow test stratified by E-LNS (D). ELN, examined lymph node. E-LNS, examined lymph node station