Compared to women with low ER expression (≤70%), women with moderate (71% to 90%) and high expression (>90%) had an elevated risk of breast cancer (OR = 1.98; 95% CI: 1.01–3.89 and OR = 2.63; 95% CI: 1.26–5.51, respectively) (Table 3). The gene discussed is ESR1; the disease is breast carcinoma.