Regression analyses between sex steroids and gray matter volumes.

a Survives Bonferroni correction (α = .0038). b significant sex-by-hormone interaction. c non-significant sex-by-hormone interaction. Testosterone levels are defined as the Z-transformation of the log-transformed testosterone levels; Estradiol levels are in pmol/l; LH levels were divided by creatinine levels to correct for variations in urine excretion rate, and log-transformed. All volumes were larger in males compared to females. Abbreviations: ES, Estradiol; GM, Gray matter; OFC, Orbitofrontal cortex; TES, testosterone; VOL, volume.