. Author manuscript; available in PMC: 2012 Jan 1.

Published in final edited form as: Sleep Breath. 2010 Feb 2;15(1):83–89. doi: 10.1007/s11325-010-0328-5

Table 1.

Descriptive statistics for OSA and control groups

Parameters	OSA patients Mean ± SD (N=53)	Controls Mean ± SD (N=31)	t test p value
Gender	45M/8F	20M/11F	0.03^a
Age (years)	58.4±10.34 (range, 29.3–80.5)	49.0±12.63 (range, 24.7–68.1)	0.0004
Neck circumference (in.)	16.3±1.50	14.8±1.25	<0.0001
Body mass index (kg/m²)	27.6±3.74 (range, 21.5–36.0)	24.9±3.28 (range, 18.2–33.5)	0.0014
RDI (events/hour)	33.9±16.30 (range, 15–79)	8.0±3.65 (range, 2–14)	<0.0001^b
Apnea index (events/hour)	14.2±15.5 (range, 0–68)	1.2±1.43 (range, 0–5)	<0.0001^b

Chi-square test

Wilcoxon rank sum test