Finasteride and reversal of hair loss

if you had to guess (rough estimate) what percent of your patients in early 20s experience regrowth in crown/vertex/midscalp when hairloss is very early. Assuming the mpb is caught very early in the young patient, does the finasteride generally regrow the crown/vertex/midscalp so that the hairloss is not-visible or aesthetically insignificant so as to make the balding undetectable to the average naked eye? Sorry for the long-winded questions. I really appreciate all of the time and effort you put into the community. Thanks again.

There is no study that I know of that will answer your basic questions; however, from my experience reversal is more likely in men under 25 with recent hair loss than men over 30