10 year study of finasteride use

This 10 year study of finasteride in Japanese men is very significant. (1) it revealed improvement and prevention of disease progression in 99.1% of the 532 Japanese men with AGA treated with 1 mg/day finasteride for 10 years, (2) younger patients show more improvement than that of older patients with AGA treatment [24,25]. In this study, AGA patients at the early stage of N-H classification showed more improvement than patients at the later stage did.

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

We evaluated the long-term (10-year) efficacy and safety of AGA treatment with 1 mg/day finasteride in a large study population (532 patients), as the first study of this kind in Japan, to our knowledge. A high objective efficacy was demonstrated by the MGPA, which revealed improvement and prevention of disease progression in 99.1% of the 532 Japanese men with AGA treated with 1 mg/day finasteride for 10 years. Furthermore, the outcome was similar to or better than that reported by other studies in Japan [8-10,13,17]. Differences have been known to occur in the progression of AGA symptoms between Japanese and Caucasian men [8,18]. This efficacy of the investigated treatment in Japanese men exceeded that reported in other studies in Caucasians. The superior response of Japanese men with AGA was reported to likely be attributable to their hair characteristics (greater diameter, black color, and lower density), which facilitated the detection of slight changes [10,19-23]. A novel finding observed in this study was the significant difference in the improvement of AGA following finasteride treatment between the N-H: I/II/III and N-H: IV/V/VI/VII groups at the first visit. The ROC analysis revealed a similar difference, that was performed to classify patients with improvement (MGPA?5) and deteriorating (MGPA<5) condition at year 10 of treatment; the cut-off point was N-H: III (AUC: 0.746). Furthermore, the MGPA of the total study population and the N-H: I/II/III group at the first visit significantly improved from treatment year 5 to 10 (P<0.001). This efficacy was different from that of a 5-year study in Japanese men, which reported that the efficacy began to plateau after 4 years of treatment [10]. Several studies have reported that AGA progresses in N-H classification with age, [7,11,12,18] and that younger patients show more improvement than that of older patients with AGA treatment [24,25]. In this study, AGA patients at the early stage of N-H classification showed more improvement than patients at the later stage did.