Table 4 Variables related with relative wall thickness (a) and E′-wave velocity (b)—univariate and multivariate linear regression analysis

	Univariate model		Multivariate model
	Beta	P-value	Beta	P-value
(a) Variables related with relative wall thickness
Male gender	0.043	0.65
Age 10 years increase	0.087	0.35
AHI (events h⁻¹)	0.329	<0.001	0.329	<0.001
Fasting glucose (mmol l⁻¹)	0.194	0.054
Abdominal obesity	0.242	0.009
24-h SBP (mm Hg)	0.012	0.90
24-h DBP (mm Hg)	−0.030	0.75
Triglycerides (mmol l⁻¹)	0.152	0.11
Decreased HDL cholesterol	0.175	0.06
(b) Variables related with E′-wave velocity
Male gender	0.023	0.81
Age (years)	−0.558	<0.001	−0.444	<0.001
AHI (events h⁻¹)	−0.367	<0.001	−0.223	0.013
Fasting glucose (mmol l⁻¹)	−0.355	<0.001	−0.227	0.009
Abdominal obesity	−0.200	0.039
24-h SBP (mm Hg)	0.094	0.34
24-h DBP (mm Hg)	−0.012	0.90
Triglycerides (mmol l⁻¹	−0.189	0.055
Decreased HDL cholesterol	−0.099	0.31

Abbreviations: AHI, apnea/hypopnea index; DBP, diastolic blood pressure; HDL, high-density lipoprotein; SBP, systolic blood pressure.
Abdominal obesity—waist circumference >88 cm female or >102 cm male. Decreased HDL cholesterol: <1.0 mmol l⁻¹ male, <1.2 mmol l⁻¹ female. Only those variables that correlated significantly and were included in the multivariate model are shown in bold.

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