TABLE 5.

MEAN VALUES (SE) FOR CEREBROVASCULAR CO2 REACTIVITY IN THE FIVE SLEEP-DISORDERED BREATHING CATEGORIES

	Outcome Measure: Cerebrovascular CO2 Reactivity (cm/s/mm Hg PETCO2)
	Model 1	Model 2	Model 3
AHI	Unadjusted	Adjusted for Age, Sex, Body Mass Index, Waist:Hip Ratio, Current Smoking, Drinks Per Week, Diabetes	Adjusted (Model 2 adjustments + MAP Slope)
1: AHI <1	2.39 (0.09)	2.39 (0.10)	2.37 (0.10)
2: AHI 1 to <5	2.36 (0.10)	2.34 (0.10)	2.35 (0.10)
3: AHI 5 to 14.9	2.10 (0.10)	2.14 (0.11)	2.15 (0.10)
4: AHI 15 to 29.9	2.34 (0.19)	2.29 (0.19)	2.30 (0.19)
5: AHI ≥ 30	1.96 (0.27)	2.02 (0.27)	2.07 (0.27)
P value for trend	0.050	0.111	0.179

Definition of abbreviations: AHI = apnea–hypopnea index; MAP = mean arterial pressure.