HCP5 and digestive system carcinoma: The results of the forest plot suggested that regardless of the digestive system carcinoma or non-digestive system carcinoma, up-regulated HCP5 expression in tumor tissues was correlated with poor OS (digestive system carcinoma, HR = 0.41; 95% CI 0.26–0.65, P = 0.0001; non-digestive system carcinoma, HR = 0.50; 95% CI 0.36–0.71, P < 0.0001, Fig. 3).