Table 1 The grouping information of patients in the quantitative study.
From: Morphological and quantitative study of the inferior alveolar nerve canal in hemifacial microsomia
Classification group | Age (year)/number of the patients | Total | ||||
|---|---|---|---|---|---|---|
 < 1 | 1–3 | 4–6 | 7–12 |  > 12 | ||
Low-grade | 27 | 27 | 26 | 30 | 9 | 119 |
High-grade | 28 | 35 | 29 | 20 | 5 | 117 |
Total | 55 | 62 | 55 | 50 | 14 | 236 |
