Table 2:

Pearson correlations^* between obesity and OSA severity measures and natural log transformed lipid measures

Measure	Total Cholesterol		LDL Cholesterol		HDL Cholesterol		Triglycerides
	rho	p	rho	p	rho	p	rho	p
BMI (kg/m2)	−0.13	0.001	−0.14	0.001	−0.16	<0.001	0.28	<0.0001
Weight (kg)	−0.16	<0.0001	−0.17	<0.0001	−0.16	<0.001	0.25	<0.0001
Neck Circumference (cm)	−0.13	0.002	−0.13	0.001	−0.20	<0.0001	0.34	<0.0001
Waist Circumference (cm)	−0.11	0.006	−0.13	0.001	−0.12	0.003	0.32	<0.0001
Waist-to-hip Ratio	−0.04	0.290	−0.05	0.177	−0.10	0.013	0.29	<0.0001
Total Abdominal fat (cm3)	−0.02	0.657	−0.05	0.239	−0.07	0.118	0.29	<0.0001
SAT (cm3)	−0.03	0.502	−0.07	0.140	−0.04	0.402	0.22	<0.0001
VAT (cm3)	0.00	0.937	−0.01	0.746	−0.11	0.016	0.33	<0.0001
AHI (events/hour)	0.04	0.300	0.01	0.725	0.09	0.022	0.03	0.428
ODI (events/hour)	−0.01	0.901	−0.02	0.559	0.02	0.606	0.06	0.157
SaO2 Nadir	0.02	0.568	0.02	0.621	0.04	0.384	−0.01	0.804
Percent Time SaO2<90†	−0.02	0.571	−0.04	0.360	0.01	0.792	0.02	0.619

Significant correlations shown in bold

^*Correlations between obesity and lipids adjusted for age and gender, correlations for OSA severity adjusted for age, gender, and BMI

^†natural log transformed for normality

OSA: obstructive sleep apnea; BMI: body mass index; SAT: subcutaneous abdominal fat; VAT: visceral abdominal fat; AHI: apnea-hypopnea index; ODI: oxygen desaturation index; LDL: low-density lipoprotein; HDL: high-density lipoprotein.