Table 3.

Correlation between AHI and S-H distance

	S-H distance
AHI, no./h	≤ 120 mm	> 120 mm
< 5	5	17
5 to < 30	12	38
≥ 30	4	4

Data are presented as number of patients in each category. AHI refers to apnea-hypopnea index; S-H, sella-hyoid.