In the GEM arm, GemPred+ patients (n = 50, 30%) had a significantly longer disease-free survival (DFS) than GemPred- patients (n = 117, 70%)(median 27 vs 10 months, HR=0.43; 95%CI [0.29-0.65] p<0.001) and overall survival (OS) (median 68 vs 29 months, HR=0.42; 95%CI [0.27-0.66] p<0.001)....The statistical interaction between GEM and GemPred+ status was significant for DFS (HR=0.44; 95%CI [0.24-0.80]; p=0.008) and OS (HR 0.37; 95%CI [0.19-0.74] p=0.004)....The GemPred signature was positive in a quarter of patients and was associated with a similar survival in the gemcitabine adjuvant group compared to mFFX.