UCA1 and gastric cancer: Besides that, our results also showed that there was a significant negative association between UCA1 levels and DFS in digestive system malignancies (HR = 2.50; 95 % CI = 1.30–3.69; p<= 0.001) (Figure 4), particularly in gastric cancer (HR =2.54; 95 % CI = 1.09–4.00, p= 0.001) (Figure 4).