Table 1.
Sample Characteristics
| Characteristic | Results |
|---|---|
| Age, y | 44.4 ± 6.8 |
| Men | 568 (46.6) |
| Non-Hispanic Caucasian | 1019 (83.7) |
| College graduate | 816 (67.2) |
| Current smoker | 231 (19.0) |
| Physical activity, weekly kcala | 2431.7 ± 1841.0 |
| Symptoms of depression, CES-Da | 7.4 ± 1.8 |
| Reported sleep duration, h | |
| < 6 (very short sleepers) | 187 (15.4) |
| 6.0–6.99 (short sleepers) | 402 (33.1) |
| 7.0–8.0 (referent group) | 525 (43.2) |
| > 8.0 (long sleepers) | 100 (8.2) |
| Presumed sleep debt | 281 (23.1) |
| Metabolic syndrome | 272 (22.3) |
| Central adiposity criterion | 412 (33.9) |
| Glucose criterion | 350 (28.8) |
| Blood pressure criterion | 317 (31.9) |
| Triglycerides criterion | 276 (22.7) |
| HDL criterion | 338 (27.8) |
| Medications | |
| Diabetic | 5 (0.4) |
| Antihypertensives | 79 (6.5) |
| Dyslipidemiab | 7 (0.6) |
| Fasting Glucose, mg/dL | 96.1 ± 17.5 |
| BMI | 27.4 ± 5.8 |
| Blood pressure | |
| Systolic | 116.3 ± 13.5 |
| Diastolic | 78.3 ± 9.5 |
| Triglycerides, mg/dL | 119.7 ± 81.4 |
| HDL, mg/dL | 53.6 ± 14.7 |
| LDL, mg/dL | 123.39 ± 32.15 |
Data are presented as mean ± SD or number (%). CES-D refers to Center for Epidemiological Studies Depression Scale; BMI, body mass index; LDL, low-density lipoprotein.
a
Symptoms of Depression (CES-D) and Physical Activity (kcal) were log transformed prior to hypothesis testing.
b
Use of fibrates or nicotinic acid for treatment of hypertriglyceridemia or low high-density lipoprotein (HDL) cholesterol.
c
Presumed sleep debt is defined as > 1 hour weekday – weekend difference.