Table 2.
Characteristics of the CHS and HABC Study Participants.*
| Characteristic | CHS (N = 579) | HABC (N = 813) |
|---|---|---|
| Age — yr | ||
| Mean | 72.5 | 73.8 |
| Range | 65–93 | 68–81 |
| Female sex — no. (%) | 367 (63.4) | 435 (53.5) |
| BMI† | 28.4±5.0 | 28.5±5.2 |
| Education — yr | 13.0±5.2 | 11.6±3.5 |
| Median income category — $ | 12,000–15,999 | 10,000–25,000 |
| Smoking status — no./total no. (%) | ||
| Current smoker | 81/576 (14.1) | 126/811 (15.5) |
| Former smoker | 209 (36.3) | 336 (41.4) |
| Never smoked | 286 (49.7) | 349 (43.0) |
| Pulmonary function — liters | ||
| FEV1 | 1.79±0.6 | 2.0±0.6 |
| FVC | 2.52±0.8 | 2.7±0.7 |
| African ancestry — % | 72.8±20.7 | 78.0±12.8 |
*
Plus–minus values are means ±SD. CHS denotes the Cardiovascular Heart Study, FEV1 forced expiratory volume in 1 second, FVC forced vital capacity, and HABC the Health, Aging, and Body Composition study.
†
The body-mass index (BMI) is the weight in kilograms divided by the square of the height in meters.