Table 2

Association of amount of CPAP use in the previous 6 months with disease-specific quality of life, sleep symptoms, depression and daytime vigilance using generalised estimating equations

Outcome variable	Regression coefficient	SE	95% CI	p Value
FOSQ	0.021	0.007	0.008 to 0.035	0.003
Sleep Symptoms Checklist	−0.070	0.013	−0.096 to −0.045	<0.001
CES-D	−0.028	0.014	−0.056 to −0.000	0.048

Visual reaction time
Mean reaction time (ms)	−0.007	0.008	−0.023 to 0.008	0.369
Mean slowest reaction time (ms)	−0.010	0.014	−0.037 to 0.017	0.457

CES-D, Center for Epidemiological Studies Depression (CES-D) Scale; CPAP, continuous positive airway pressure; FOSQ, Functional Outcomes of Sleep Questionnaire.