UCA1 and gastric cancer: In a subgroup analysis of cancer sites, significant negative associations were found between levels of UCA1 and OS in the following cancers: colorectal (HR2.61, 95% CI1.56–4.37), NSCLC (HR1.49, 95% CI1.16-1.90), gastric cancer (HR2.19, 95% CI1.36–3.51), and ovarian cancer (HR1.89, 95% CI1.14–3.12).