The expression levels of HIF-1α and Snail in ovarian cancer exhibited a positive correlation (r=0.231; P=0.021), whereas the expression levels of Snail and E-cadherin were negatively correlated (r=−0.225; P=0.028), as presented in Table V, and there was a negative correlation between HIF-1α and E-Cadherin (r=−0.306; P<0.05). The gene discussed is HIF1A; the disease is ovarian cancer.