Table 2.
Characteristics of Study Sample at First Assessment
| Variable | Full Sample (n = 1,400) | Longitudinal Sample (n = 615) | ||
|---|---|---|---|---|
| Mean (SD or %) | Range | Mean (SD or %) | Range | |
| Age, y | 54.3 (16.2)* | 19–94 | 56.1 (14.6) | 20–89 |
| Sex, % men | 50.5 | — | 51.5 | — |
| Race, % white | 73.6 | — | 84.6 | — |
| Education, y | 16.7 (2.5) | 4–24 | 16.8 (2.5) | 4–24 |
| Body mass index, kg/m2 | 26.0 (4.3) | 17.0–46.4 | 25.8 (4.0) | 17.0–44.2 |
| Hypertension, % | 40.9 | — | 39.0 | — |
| Antihypertensives, % | 17.2 | — | 15.6 | — |
| Cardiovascular disease, % | 14.2 | — | 14.3 | — |
| Inflammatory disease, % | 42.7 | — | 46.8 | — |
| CES-D, total score | 6.5 (6.8) | 0–50 | 6.1 (6.4) | 0–46 |
| VO2max, mL O2/kg/min | 28.6 (7.9) | 8.2–61.9 | 28.4 (6.9) | 8.2–61.9 |
Notes: SD = standard deviation; CES-D = Center for Epidemiological Studies-Depression scale; VO2max = symptom-limited maximal oxygen consumption.
* The baseline age distribution was as follows: n = 257 aged 19–39 years, n = 755 aged 40–65 years, and n = 388 aged >60 years.