Timing of Initial Hair Regrowth and Clinical Trial-Defined Response Following Ritlecitinib Treatment in Patients With Alopecia Areata

The study analyzed the timing of hair regrowth in 831 patients with alopecia areata treated with ritlecitinib. It found that 73% of patients achieved a 30% improvement in hair regrowth (SALT30), with 66% reaching this milestone before achieving a more significant regrowth (SALT ≤20). The median time from SALT30 to SALT ≤20 was 93 days, varying based on when SALT30 was achieved: 87 days for early responders, 170 days for middle responders, and 267 days for late responders. These findings highlight the time needed to reach clinical response, aiding in setting realistic treatment expectations for patients and clinicians.