Figure 2.

Lines represent regression of testosterone on E2. Cases are plotted as black circles while controls as red. Regression line equation for controls: E2 = 1.002+0.02* Testosterone, R² = 0.181 p-values 0.235, <0.001 for constant and beta1, respectively. Regression line equation for cases: E2 = 1.212+0.028*Testosterone, R² = 0.061 p-values <0.001, <0.001 for constant and beta1, respectively. E2, pg/ml, Testosterone, pg/ml.