We read with interest the 12-month observational study by Imai et al. 1 regarding CGRP monoclonal antibodies (CGRP-mAbs) in Japanese patients. Although the study provides many valuable real-world data, we would like to raise three specific issues concerning the interpretation and statistical modeling of the data presented, about which more clarification is needed.
Ullah et al. (Sun,) studied this question.