Table 2

Univariate analysis

	HR	SE	p Value	95% CI
Gender (male=reference)	0.80	0.30	0.553	0.39 to 1.65
Age (years)	1.02	0.01	0.013	1.01 to 1.04
Neck circumference (cm)	0.96	0.03	0.152	0.92 to 1.01
Oxygen desaturation index (1 event/h)	0.97	0.01	<0.001	0.96 to 0.98
Epworth Sleepiness Score	0.97	0.02	0.185	0.94 to 1.01
CPAP pressure (cm H₂O)	0.80	0.07	0.010	0.67 to 0.95
Research participation (yes=reference)	1.27	0.26	0.239	0.85 to 1.90