Table 3

Linear regression analyses assessing the association between the change in OAHI and different independent variables (n = 45)

	Univariate		Multivariate
	Univariate		Model 1*		Model 2†
	β (SE)	p Value	β (SE)	p Value	β (SE)	p Value
Male gender	2.10 (1.44)	0.153	4.69 (1.29)	<0.001	2.60 (1.18)	0.033
Baseline characteristics
Age	−0.64 (0.39)	0.106	−0.92 (0.34)	0.009	−0.01 (0.36)	0.987
BMI	0.26 (0.18)	0.174
BMI z-score	1.33 (0.66)	0.048	0.97 (0.55)	0.084
Waist	0.03 (0.06)	0.643
Waist z-score	0.81 (0.63)	0.206
OAHI	0.76 (0.65)	0.248
Large tonsils	3.75 (1.33)	0.007	4.36 (1.24)	0.001
Habitual snoring	2.85 (1.38)	0.045	0.92 (1.21)	0.453
Changes over 2 years
BMI	0.51 (0.45)	0.261
BMI z-score	0.44 (1.50)	0.769
Waist	0.41 (0.09)	<0.001			0.30 (0.09)	0.002
Waist z-score	2.48 (1.09)	0.028
Persistent large tonsils	6.26 (1.51)	<0.001			5.69 (1.36)	<0.001

*Adjusted for baseline characteristics including age, gender, body mass index z-score, presence of large tonsils and habitual snoring.
†Adjusted for age at baseline, gender, change in waist circumference and presence of persistent large tonsils.
BMI, body mass index; OAHI, obstructive apnoea hypopnoea index; waist, waist circumference.