Mandibular volume in our study was measured from CT scans using a bone segmentation technique, which is rather accurate and has been used before., Although Japanese-Brazilians had a shorter mandible length, mandible height was higher when compared with whites (marginal P value = .07). The higher mandible height among Japanese-Brazilians as compared with whites observed in our study is consistent with a previous report. Figure 1 of our paper characterizes well the shorter mandible length, larger mandible height, larger mandible volume, and smaller tongue volume of the Japanese-Brazilian subject as compared with the white subject. For these reasons, we believe that our observations on the mandibular dimensions and anatomical imbalance among Japanese-Brazilians and whites are consistent. We support further studies to explore the upper airway anatomical characteristics leading to OSA.