Fig. 5.

Tracts exhibiting significant interaction effects of sex and changes in testosterone in predicting changes in FA. Data and trends plotted include adjustment of covariates (Time 1 levels of testosterone, Time 1 age, FA of tract at Time 1, time of saliva collection, motion during scan, and tract length) on FA (i.e., regressing out the effects of these covariates). Change in testosterone refers to the difference in log (ln) transformed testosterone values scaled by the interval between timepoints. See Table 3 for more details.