Table 1.
Sample characteristics and descriptive statistics (N = 647): MIDUS 1995–2009.
| Variables | Mean/% (SD) | Min | Max |
|---|---|---|---|
| Inflammatory markers (2004–2009) | |||
| C-reactive protein (mg/dL) (High risk: ≥3.00) | 2.13 (2.2) | 0.14 | 9.98 |
| Fibrinogen (mg/dL) (High risk: ≥385) | 386 (79) | 94 | 759 |
| Interleukin-6 (pg/mL) (High risk: ≥3.04) | 2.57 (2.5) | 0.16 | 23.00 |
| E-selectin (ng/mL) (High risk: ≥49.12) | 41.15 (21.0) | 0.09 | 161.85 |
| ICAM-1 (ng/mL) (High risk: ≥ 327.90) | 285.25 (97.10) | 74.45 | 896.47 |
| Inflammation burden index | 1.23 (1.2) | 0 | 5 |
| 0 | 34.9% | ||
| 1 | 30.0% | ||
| 2 | 18.9% | ||
| 3 | 10.5% | ||
| 4 | 4.3% | ||
| 5 | 1.4% | ||
| Social support (1995–2006) | |||
| Family support | 3.53 (0.49) | 1.50 | 4 |
| Friend support | 3.30 (0.56) | 1.13 | 4 |
| Spouse support | 3.63 (0.45) | 1.58 | 4 |
| Total support | 3.47 (0.42) | 2 | 4 |
| Social strain (1995–2006) | |||
| Family strain | 2.02 (0.49) | 1 | 3.75 |
| Friend strain | 1.83 (0.39) | 1 | 3.13 |
| Spouse strain | 2.17 (0.53) | 1 | 3.92 |
| Total strain | 2.01 (0.36) | 1.08 | 3.53 |
| Neuroendocrine markers (2004–9) | |||
| Epinephrine (ug/dL)a | 0.14 (0.1) | 0.01 | 1.00 |
| Norepinephrine (ug/dL)a | 1.99 (1.5) | 0.23 | 14.30 |
| Sociodemographic status (2004–6) | |||
| Female | 0.50 (0.5) | 0 | 1 |
| Age | 55.42 (11.3) | 34 | 83 |
| Household income (thousands) | 87.46 (63.7) | 0 | 300 |
| Educational attainment | |||
| High school or less | 27.7% | ||
| Some college | 27.8% | ||
| College or more | 44.5% | ||
| Health behaviors (2004–9) | |||
| Body Mass Index (BMI) | 29.02 (5.6) | 14.99 | 57.40 |
| Current smoker | 0.10 (0.3) | 0 | 1 |
| Exercise at least 3× a week | 0.81 (0.4) | 0 | 1 |
| Medications(2004–9) | |||
| Blood pressure | 0.37 (0.4) | 0 | 1 |
| Cholesterol | 0.32 (0.5) | 0 | 1 |
| Corticosteroids | 0.12 (0.3) | 0 | 1 |
| Antidepressants | 0.13 (0.3) | 0 | 1 |
a
Epinephrine and norepinephrine are adjusted for creatinine output.