Table 3.

Differences in characteristics and vascular reactivity between men and women with OSA^a

	Men (n = 20)	Women (n = 18)	P Value
AHI, events/h	25.0 (15.1, 44.5)	21.5 (15.8, 122.3)	0.75
Age, y	43.5 ± 10.5	44.7 ± 10.2	0.73
BMI, kg/m2	33.3 (31.0, 37.6)	41.7 (37.4, 47.3)	0.003
Waist-to-hip ratio	0.99 ± 0.07	0.88 ± 0.07	< 0.001
%FMD	5.7 ± 3.9	5.8 ± 3.7	0.91
%NID	17.4 ± 5.4	19.8 ± 8.0	0.27
%Ach	50.0 (33.3, 81.9)	71.3 (38.8, 89.8)	0.22
%SNp	39.3 (21.1, 77.3)	69.7 (43.7, 90.2)	0.035
AIx (%)	14.4 ± 8.2	27.1 ± 7.5	< 0.001

^aObstructive sleep apnea (OSA) was defined as an apnea-hypopnea index (AHI) ≥ 10 events/h.

For normally distributed data, mean ± SD are shown; for nonparametric distributed data, medians (25^th, 75^th percentiles) are represented. The augmentation index (AIx) is corrected to 75 bpm.

%FMD refers to the percentage change in brachial artery diameter after flow-mediated dilation; %NID, percentage change in brachial artery diameter after nitroglycerin-induced dilation; %Ach, percentage change in laser Doppler flowmetry of the skin microcirculation after iontophoresis of acetylcholine; %SNp, percentage change in laser Doppler flowmetry of the skin microcirculation after iontophoresis of sodium nitroprusside.