Table 1.
Selected Baseline Characteristics
| Sample Characteristic | Data |
|---|---|
| N | 5,712 |
| Age, yr | 63.3 (11.1) [39–90] |
| BMI, kg/m2 | 28.1 (5.1) [18–50] |
| Gender, % female | 52 |
| AHI, events/h* | 13.8 (15.0) [0–157] |
| Sleep time, min | 360 (64) [35–519] |
| Sleep efficiency, % | 81.5 (10) [11.3–98.5] |
| % time in REM | 19.3 (6.9) [0–43] |
| WASO, min | 61.6 (44) [0–368] |
| Arousal index, h−1 | 19.2 (10.7) [0–110] |
| % sleep < 90% saturation | 3.5 (10.3) [0–100] |
| AHI, events/h | 13.8 (15.0) [0–157] |
| OSA severity, % | |
| None | 33 |
| Mild | 35 |
| Moderate | 20 |
| Severe | 12 |
| Race, % | |
| African American | 9 |
| White | 85 |
| Other | 6 |
| Smoking status, % | |
| Current | 10 |
| Former | 47 |
| Never | 43 |
| Prevalent disease, % | |
| Hypertension | 43 |
| Diabetes | 8 |
| CHD | 8 |
| Stroke | 3 |
| HF | 2 |
| Any CVD† | 11 |
| Outcomes | |
| Deaths | 1,290 |
| Follow-up time, person-years | 62,899 |
| Mortality rate per 1,000 person-years | 20.5 |
Definition of abbreviations: AHI = apnea–hypopnea index; BMI = body mass index; CHD = coronary heart disease; CVD = cardiovascular disease; HF = heart failure; OSA = obstructive sleep apnea; WASO = wake after sleep onset.
Data are presented as mean (SD) [range] unless otherwise noted.
*
AHI defined by the respiratory disturbance index with a 3% desaturation threshold.
†
Any prevalent CHD, stroke, or HF.