BRD2 and Abdominal obesity: However, when multivariable regression analysis was performed, the relationship between FSH and glutathione peroxidase disappeared, and abdominal obesity, which was assessed by waist circumference, was the only variable significantly associated with lower FSH levels, suggesting that abdominal obesity may be a major determinant and modulator of antioxidant capacity as assessed by glutathione peroxidase [45].