Sleep architecture and the apnoea-hypopnoea index in children with obstructive-sleep apnoea syndrome

summary This study aimed to examine the sleep architecture and craniofacial morphology in a group of children divided by different levels of apnoea‐hypopnoea index (AHI), 5, 4·5, 4, 3·5, 3 and 2·5, and to determine an AHI threshold value at which sleep architecture is most affected. 23 children, who were selected from a preliminary questionnaire survey about sleep‐related breathing disorders, were evaluated with cephalometric radiographs and overnight polysomnography. The findings indicated that the children with AH1 ≥2·5 and ≥3 showed significantly larger numbers of waking (p