Log odds of positive lymph nodes is a better prognostic factor for oesophageal signet ring cell carcinoma than N stage

Table 3 Prognostic performance of different lymph node staging systems for overall survival

Model	C-Index	P value	AIC	P value
Model 1 (N stage)	0.656	< 0.001	1697.519	< 0.001
Model 2 (LODDS)	0.673	< 0.001	1688.824	< 0.001

AIC: Akaike information criterion; C-Index: Harrel’s concordance index; LODDS: Log odds of positive lymph nodes.