approached significanceP = 0.073
In a multivariate Cox regression analysis that assessed each eligibility criterion separately, only celiac lymph node involvement [hazard ratio (HR) 3.583; 95% CI 1.884–6.814; P = 0.000] was an independent prognostic factor for OS. Disease-Free Survival The difference in DFS between group 1 and 2 approached significance ( P = 0.073; Fig. 1 b), with a median of 42.5 months (95% CI 15.7–69.4 months) in group 1 and 18.2 months (95% CI 7.4–28.9 months) in group 2.