Relationship between Work classification and clinical characteristics of CFBCAs
| Clinical features | Work type I (n=16) | Work type II (n=4) |
| Gender | ||
| Male | 9 | 2 |
| Female | 7 | 2 |
| Lateral | ||
| Left | 10 | 3 |
| Right | 6 | 1 |
| History of infection | ||
| Yes | 14 | 3 |
| No | 2 | 1 |
| Course of the disease | ||
| <1 year | 3 | 2 |
| ≥1 year | 13 | 2 |
| Recurrence | ||
| Yes | 1 | 0 |
| No | 15 | 4 |
| Postoperative facial paralysis | ||
| Yes | 0 | 0 |
| No | 16 | 4 |
| The auricle was red and swollen after operation | ||
| Yes | 2 | 0 |
| No | 14 | 4 |
CFBCAs, congenital first branchial cleft anomalies.