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| African Americans | Caucasians | Asians |
|---|---|---|
| More obese | Both bony and soft tissue abnormalities | Craniofacial skeletal abnormalities |
| Enlarged upper airway | Brachycephaly | Smaller maxilla |
| soft tissues | Retropositioned mandible | |
| Prognathism | Midfacial hypoplasia | |
| Macroglossia |
Abbreviation: OSA, obstructive sleep apnea.
