Table 7.

Adjusted comparisons of hyoid distances between Icelandic and Chinese patients matched for age, gender and ODI

Variable	Model 1: age, ODI, height Adjusted mean (95% CI)		p	Model 2: age, ODI, BMI Adjusted mean (95% CI)		p
	Icelandic	Chinese		Icelandic	Chinese
Hyoid to retropogonion (mm)	42.92 (41.69, 44.15)	40.71 (38.89, 42.52)	0.0636	42.76 (41.54, 43.98)	41.01 (39.24, 42.78)	0.1292
Hyoid to C3 (mm)	36.94 (35.94, 37.93)	39.46 (38.03, 40.89)	0.0064	37.12 (36.06, 38.19)	39.03 (37.57, 40.48)	0.0350
Hyoid to sella (mm)	119.3 (117.6, 121.0)	129.3 (126.8, 131.7)	<0.0001	122.4 (120.1, 124.6)	123.1 (120.1, 126.1)	0.6854
Retropogonion to C3 (mm)	72.29 (70.80, 73.79)	65.34 (63.14, 67.54)	<0.0001	71.08 (69.67, 72.49)	67.69 (65.69, 69.70)	0.0080

Significant p-values are given in bold. Bonferroni corrected significance level: p < 0.0125 (equals 0.05/4).

BMI, body mass index, C3, the 3rd cervical vertebrae, CI, confidence interval, ODI, oxygen desaturation index.