Table 1.
Description of Sample
| Variable | N | Mean (SD) | Median (interquartile range) | Category N (%) |
|---|---|---|---|---|
| A. General | ||||
| Male | 907a | 500(55.1%) | ||
| Age (y) | 52.5 (8.1) | |||
| Body mass index b (Kg/m2) | 29.1 (25.9,33.4) | |||
| Waist-hip ratio (waist girth/hip girth) | 0.90 (.09) | |||
| B. Sleep duration | ||||
| i. Polysomnography-derived | ||||
| Total sleep time (h) | 6.3 (1.0) | |||
| ii. Self-reported | ||||
| Usual sleep (h) | 906 | 7.1 (1.0) | ||
| C. Sleep-disordered breathing | ||||
| i. Apnea-hypopnea index (AHI) | ||||
| AHI < 5 | 623 (68.7%) | |||
| AHI 5–15 | 173 (19.1%) | |||
| AHI ≥ 15 | 111 (12.2%) | |||
| ii. Habitual snoring | 899 | 418 (46.5%) | ||
| D. Hormones & Metabolites | ||||
| C-reactive protein (mg/L) | 2.4 (1.1, 5.0) | |||
| Leptin (ng/ml) | 903 | 12.7 (6.3, 24.1) | ||
| Insulin (ng/dl) | 899 | 9.9 (6.6, 15.1) | ||
| Glucose (mg/dl) | 906 | 94 (88, 102) | ||
| E. Insulin sensitivity, diabetes, and cardiovascular disease | ||||
| QUICKI b | 864 | 0.34 (.04) | ||
| Diabetes | 906 | 58 (6.4%) | ||
| Hypertension | 906 | 346 (38.2%) | ||
| Cardiovascular disease | 906 | 48 (5.3%) | ||
| F. Lifestyle | ||||
| Current Smoking | 906 | 120 (13.3%) | ||
| Alcohol (drinks/wk) | 906 | 3.7 (5.2) | ||
| Exercise: none | 901 | 330 (36.6%) | ||
| H. Medications | ||||
| Cholesterol-lowering | 126 (13.9%) | |||
| Anti-inflammatory | 243 (26.8%) | |||
| Estrogen or oral contraceptive | 114 (12.6%) |
a
N = 907 unless indicated otherwise
b
BMI: body mass index; QUICKI: quantitative insulin sensitivity check index