Markers of Sleep-Disordered Breathing and Metabolic Syndrome in a Multiethnic Sample of US Adults: Results from the National Health and Nutrition Examination Survey 2005–2008

Table 1

Baseline characteristics of the study population.

Characteristics	Mean values ± standard error (SE) or number (percentages) (𝑛=6122)
Women (%)	2950 (50.1)
Age (years)	44.63±0.46
Race/Ethnicity (%)
Non-Hispanic Whites	3047 (73.1)
Non-Hispanic Blacks	1214 (9.7)
Mexican Americans	1139 (7.9)
Others	722 (9.3)
Education categories (%)
Below high school	1622 (16.7)
High school	1481 (24.3)
Above high school	3019 (59.0)
Smoking (%)
Never smoker	3242 (52.6)
Former smoker	1461 (23.8)
Current smoker	1419 (23.6)
Alcohol intake, (%)
Never drinker	780 (10.1)
Former drinker	1104 (14.9)
Current moderate drinker	2529 (46.4)
Current heavy drinker	1709 (28.6)
Moderate physical activity (%)	2870 (53.9)
Total cholesterol (mg/dL)	0.38±0.01
Waist circumference (cm)	96.95±0.42
Triglycerides (mg/dL)	157.98±2.5
HDL-cholesterol (mg/dL)	53.16±0.34
Systolic blood pressure (mm Hg)	120.48±0.34
Diastolic blood pressure (mm Hg)	70.92±0.29
Fasting glucose (mg/dL)	104.22±0.61