Fig. 6

High expression levels of KIF15 is related with several clinicopathological characteristics, and predicts poor prognosis of GC patients. a KIF15 expression level was higher in elder (> 67) GC patients (P < 0.001). b KIF15 expression level was markedly increased in low GC tumor grade (G1/G2) than in high GC tumor grade (G3) (P < 0.001). c, d Regression analysis of correlation of BIRC5, HSPD1 gene expression levels and KIF15 expression level in GC tissues (Spearman r = 0.74 and 0.69 respectively, P < 0.001). e TNFRSF1A expression was inversely correlated with KIF15 expression in TCGA database (Spearman r = − 0.43, P < 0.001). f Kaplan–Meier curves of overall survival was analyzed according to KIF15 expression levels in 122 patients with GC. The result showed that higher expression level of KIF15 represents poor prognosis (P < 0.01)