The subgroup meta-analysis of studies with the cutoff score < 20% showed high ALDH expression was associated with poor OS (HR, 1.29; 95% CI, 1.06-1.57; I2=0%) and DFS (HR, 1.83; 95% CI, 1.45-2.31; I2=0%) of ovarian cancer patients. This evidence concerns the gene LDHA and ovarian cancer.