Table 4a:

Linear regression analysis with ESS total score at 6 months as the dependent variable

Variable	Beta	Std. Error	Standardized Coefficient (Beta)	t	P
Age	0.020	0.015	0.058	1.328	0.185
Gender (Female)	−0.548	0.374	−0.062	−1.466	0.143
BMI	−0.031	0.025	−0.055	−1.210	0.227
HAMD Total Score	0.023	0.040	0.023	0.566	0.571
Chronic Pain	0.766	0.462	0.069	1.660	0.098
GERD	0.045	0.380	0.005	0.119	0.906
Baseline ESS	0.495	0.039	0.528	12.679	<0.001*
AHI Baseline	−0.007	0.008	−0.038	−0.841	0.401
AHI at 6 Months	−0.025	0.022	−0.049	−1.144	0.253
Mean Hours of CPAP Adherence	−0.240	0.067	−0.151	−3.579	<0.001*

ESS: Epworth Sleepiness Scale

BMI: Body Mass Index

HAMD: Hamilton Rating Scale for Depression

GERD: Gastroesophageal Reflux Disease

AHI: Apnea-Hypopnea Index

CPAP: Continuous Positive Airway Pressure