Table 2.
Descriptives of AAs (n = 133) and EAs (n = 293) in the MIDUS study
| Variables | AA, mean ± SD or % | EA, mean ± SD or % | Difference, P value |
| Age, y | 54.9 ± 10.2 | 57.6 ± 11.8 | 0.016 |
| Female, % | 72.9 | 54.9 | <0.001 |
| Partnered, % | 43.2 | 75.8 | <0.001 |
| Educational attainment, % | |||
| ≤High school degree | 44.4 | 26.0 | <0.001 |
| Some college | 32.3 | 27.7 | 0.34 |
| ≥B.S. or equivalent | 23.3 | 46.2 | <0.001 |
| Income, $103 | 39.4 ± 33.3 | 74.1 ± 56.1 | <0.001 |
| Exercise, min/d | 35.5 ± 65.2 | 39.6 ± 46.0 | 0.47 |
| Fast food consumption, % | |||
| None | 13.6 | 18.1 | 0.26 |
| Less than once a week | 35.6 | 32.8 | 0.57 |
| Once a week or more | 50.8 | 49.2 | 0.76 |
| Depressive symptoms | 11.8 ± 9.6 | 6.34 ± 6.26 | <0.001 |
| Cigarette smoker, % | 24.8 | 10.9 | 0.001 |
| Total sleep time, min | 340.6 ± 73.9 | 381.3 ± 62.9 | <0.001 |
| Sleep efficiency | 72.3 ± 11.5 | 82.2 ± 8.7 | <0.001 |
| Waist circumference, cm | 102.7 ± 19.4 | 97.1 ± 16.4 | 0.005 |
| Systolic BP, mmHg | 135.0 ± 21.1 | 131.7 ± 17.1 | 0.12 |
| Diastolic BP, mmHg | 78.8 ± 11.9 | 76.6 ± 10.2 | 0.046 |
| HbA1c | 6.72 ± 1.79 | 5.95 ± 0.76 | <0.001 |
| HOMA-IR | 4.85 ± 4.47 | 3.49 ± 4.31 | 0.004 |
| Triglycerides, mg/dL | 114.7 ± 66.3 | 134.2 ± 81.1 | 0.009 |
| HDL-C, mg/dL | 59.1 ± 19.2 | 52.1 ± 16.2 | <0.001 |
| CRP, μg/mL | 4.85 ± 5.87 | 2.79 ± 4.98 | 0.001 |
| CBM risk | 1.17 ± 0.46 | 1.04 ± 0.50 | 0.013 |
Data not designated as percentages are expressed as mean ± SD. Race differences were tested using independent samples t tests and χ2 tests. BP, blood pressure.