EDS	Excessive daytime sleepiness
ESS	Epworth Sleepiness Scale
FNLHP	First Nations Lung Health Project
COPD	Chronic obstructive pulmonary disease
BMI	Body mass index
SOB	Shortness of Breath
OR	Odds ratio
CI	Confidence interval
GEE	Generalized estimating equations
QIC	Quasi likelihood under the independence model criterion
MSLT	Multiple sleep latency test