. Author manuscript; available in PMC: 2016 Apr 27.

Published in final edited form as: Respiration. 2015 Mar 19;89(4):304–311. doi: 10.1159/000371768

Table 1.

Clinical characteristics of the study population.

Variable	Normal (AHI<15/hr)	Mild to moderate (15≤AHI<30/hr)	Severe (AHI≥30/hr)	P
Number of subjects	226	127	118
Male	66, (29.2)	77 (60.6)	85 (72.0)	<0.001^†
^$ Age, yr	67.9 (5.60)	67.7 (5.43)	68.2 (5.73)	0.743
^$ BMI, kg/m²	23.3 (2.47)^a	24.4 (2.79)^a	25.5 (3.17)^a	<0.001^*
Current smokers	12 (5.4)	12 (9.5)	13 (12.4)	0.078
Hypertension	123 (54.4)	71 (55.9)	72 (61.0)	0.498
Diabetes	44 (19.5)	24 (18.9)	26 (22.0)	0.802
Dyslipidemia	98 (43.6)	53 (42.1)	52 (44.4)	0.930

Data are presented as number of subjects (% within each AHI group).

Data are presented as means (s.d.);

^†

P<0.05 by chi square test;

P<0.05 by ANOVA;

P<0.05 by pairwise comparison between the means with same superscript with Boferroni’s correction; AHI, apnea-hypopnea index; BMI, body mass index