Table 1.
Baseline demographics.
| Variable | Categories | Mean/% | S.D. |
|---|---|---|---|
| Age (years) | 53.1 | 17.4 | |
| Gender | Female | 57.84% | |
| Race | White | 68.05% | |
| Black | 10.20% | ||
| Other | 21.76% | ||
| Ethnicity | Hispanic | 14.71% | |
| BMI (Kg/m2) | 29.1 | 6.6 | |
| Mental health | Days with poor mental health (past month) | 3.21 | 7.30 |
| Anxiety | ≥15 days (past month) | 12.61% | |
| Depression | ≥15 days (past month) | 6.01% | |
| Exercise (in minutes) | Moderate/vigorous exercise | 124 | 187 |
| Education | College graduate | 26.51% | |
| Less than high school | 21.30% | ||
| High school graduate | 25.88% | ||
| Some college education | 26.31% | ||
| Income (per year) | >75,000 | 29.79% | |
| <20,000 | 17.24% | ||
| 20,000–25,000 | 7.65% | ||
| 25,000–35,000 | 12.45% | ||
| 35,000–45,000 | 10.40% | ||
| 45,000–55,000 | 8.78% | ||
| 55,000–65,000 | 7.03% | ||
| 65,000–75,000 | 6.66% | ||
| General heath | Excellent | 16.77% | |
| Very good | 29.57% | ||
| Good | 34.31% | ||
| Poor | 15.80% | ||
| Very poor | 3.55% | ||
| Marital status | Married | 63.04% | |
| Widowed | 9.43% | ||
| Divorced/separated | 11.11% | ||
| Never married | 12.29% | ||
| Living with partner | 4.13% | ||
| Insurance status | Insured | 85.35% | |
| Caffeine use | Present | 91.06% | |
| Smoker | Yes | 11.03% | |
| Daytime sleepiness | Present | 15.07% | |
| Sleep duration | Sleep duration (hrs) | 6.91 | 1.36 |
| Insomnia symptoms | Difficulty falling asleep (DFA, ≥5 nights/month) | 16.05% | |
| Difficulty maintaining sleep (AWAK, ≥5 nights/month) | 18.15% | ||
| Nonrestorative sleep (NRS, ≥5 nights/month) | 22.32% | ||
| Alcohol quantity | Drinks/day (past 12 months) | 1.25 | 2.28 |
| Drinking frequency | Drinking days (past 12 months) | 40.9 | 85.8 |
| Heavy drinking status | Present (past 12 months) | 9.77% | |
| Heavy drinking frequency | Heavy drinking days (past 12 months) | 4.23 | 27.18 |
S.D.: standard deviation.