Baseline characteristics of individuals according to Global Deficit Score and Domain Deficit Score categories.

Values are means (SD) for normally distributed variables, percent, or median (interquartile range, IQR) for skewed variables. t-tests were performed for continuous variables (skewed variables were log transformed before computations) and Chi-squared tests were used for categorical variables. Abbreviations: BMI = Body Mass Index, PSQI = Pittsburgh Sleep Quality Index, RDI = Respiratory Disturbance Index, ESS = Epworth Sleepiness Scale, ACTH = Adrenocorticotropic Hormone. SI conversion factors: To convert ACTH to pmol/L, multiply values by 0.22; to convert cortisol to nmol/L, multiply values by 27.588; to convert dopamine to nmol/d, multiply values by 6.528; to convert epinephrine to nmol/d, multiply values by 5.459; to convert norepinephrine to nmol/d, multiply values by 5.911; to convert free cortisol to nmol/d, multiply values by 2.759; to convert total ghrelin to pmol/L, multiply values by 0.296.