Table 1.
Baseline characteristics of the analytical sample
| Characteristic | Overall (n=1,111) | Less than 6 hours (n=199) | 6 to 8 hours (n=625) | Greater than 8 hours (n=287) |
|---|---|---|---|---|
| 7 (1) | 5 (1) | 7 (1) | 9 (1) | |
| Age (years) | 68 (9) | 68 (10) | 67 (9) | 70 (9) |
| Female | 54% | 40% | 52% | 67% |
| Race/ethnicity | ||||
| White | 35% | 19% | 36% | 43% |
| Asian | 14% | 18% | 12% | 16% |
| Black | 28% | 44% | 28% | 18% |
| Hispanic | 23% | 19% | 24% | 23% |
| Smoking status | ||||
| Never Smoker | 51% | 46% | 52% | 53% |
| Former Smoker | 42% | 44% | 43% | 39% |
| Current Smoker | 7% | 10% | 5% | 8% |
| AHI (events/hr) | 14 (16) | 19 (18) | 13 (15) | 14 (17) |
| BMI (kg/m2) | 29 (6) | 30 (6) | 29 (5) | 28 (6) |
| Systolic blood pressure (mmHg) | 123 (20) | 124 (22) | 122 (19) | 124 (19) |
| Diastolic blood pressure (mmHg) | 69 (10) | 70 (11) | 69 (10) | 68 (10) |
| Statin use | 36% | 28% | 38% | 38% |
| Antidepressant use | 9% | 10% | 7% | 13% |
| Diabetes | 16% | 17% | 16% | 15% |
| Total intentional exercise (min/wk) | 2,952 (4,060) | 3,146 (3,888) | 3,091 (4,483) | 2,591 (3,097) |
| Education attainment | ||||
| Less than high school | 14% | 10% | 14% | 18% |
| High school | 45% | 45% | 46% | 44% |
| College and beyond | 41% | 45% | 40% | 38% |
| Interstitial lung abnormalities | 12% | 11% | 11% | 14% |
Continuous variables presented as mean (standard deviation) and categorical variables presented as percentages