showed a trendP = 0.024
Eight studies with 736 patients showed a trend for correlation between Ki-67 overexpression and advanced TNM stages, with a pooled OR of 1.50 (95%CIs:1.053~ 2.126, Z = 2.25, P = 0.024; I 2 = 36.90%, P = 0.134, Additional file 3 : Figure S3C).