Table 4. All-cause mortality and presence of sleep apnea – univariate analysis.

	Hazard ratio (HR)	Confidence interval of HR	p-value
AHI ≥ 5/h (vs AHI < 5/h as reference)	1.47	0.68–3.16	0.33
AHI ≥ 15/h (vs AHI < 15/h as reference)	1.20	0.50–2.85	0.68
AHI ≥ 30/h (vs AHI < 30/h as reference)	1.20	0.41–3.48	0.74
AHI (+1/h increase)	1.01	0.98–1.03	0.62
Charlson Comorbidity Index (+1 point increase)	1.28	1.04–1.58	0.02