SOD2 and breast cancer: We found that SOD2 expression was higher in the control group than in patients with BC in female (p < 0.01) and male (p < 0.001) populations, BMI < 25 (p < 0.001) and BMI ≥ 25 (p < 0.001) groups, non-smokers (p < 0.001) and smokers (p < 0.001).