10 year Japanese Study of Finasteride use

This graph taken from the article below, tells us a great deal about long term finasteride use by pattern of hair loss.  Look at the stabilizing effect on the progressive nature hair genetic hair loss once the pattern has been achieved (about 5 years into the study). It appears that many of the less advanced patterns of hair loss, have even gained some hair over the 10 year study.

Source: https://www.oatext.com/Long-term-(10-year)-efficacy-of-finasteride-in-523-Japanese-men-with-androgenetic-alopecia.php