Table 1.
Descriptive characteristics of Normative Aging Study (NAS) cohort for the study period (2000–2017).
| Visit 1 (Baseline) | All visits | |
|---|---|---|
| Total observations (n) | 726 | 2075 |
| Characteristics | n (%) or Mean ± SD | n (%) or Mean ± SD |
| Race (%White) | 706 (98.1) | 2012 (97.9) |
| Current Smoker | 32 (4.4) | 79 (3.8) |
| Former Smoker | 467 (64.5) | 1340 (64.7) |
| Never Smoker | 225 (31.1) | 652 (31.5) |
| Alcohol (>2 drinks daily) | 134 (18.5) | 369 (17.8) |
| Coronary heart disease | 216 (29.8) | 751 (36.2) |
| Stroke | 52 (7.2) | 171 (8.2) |
| Diabetes | 97 (13.4) | 337 (16.2) |
| Corticosteroids | 48 (6.7) | 101 (6.8) |
| Beta blocker | 261 (35.9) | 851 (41.0) |
| Chronic Pulmonary Diseasesa | 132 (18.3) | 346 (18.7) |
| FVC (L) | 3.35 ± 0.67 | 3.42 ± 0.70 |
| %-Predicted FVC | 94.29 ± 16.16 | 95.20 ± 15.80 |
| FEV1 (L) | 2.51 ± 0.58 | 2.53 ± 0.59 |
| %-Predicted FEV1 | 92.65 ± 18.50 | 93.75 ± 17.88 |
| FEV1/FVC (%) | 75.0 ± 8.00 | 73.0 ± 8.00 |
| Age (y) | 73.2 ± 6.90 | 76.7 ± 7.10 |
| Height (in) | 68.5 ± 2.70 | 68.3 ± 2.80 |
| BMI (kg/m2) | 28.1 ± 4.00 | 27.9 ± 4.00 |
| Cumulative smoking (pack-years) | 21.0 ± 25.40 | 28.0 ± 22.80 |
SD (standard deviation); FVC (forced vital capacity); FEV1(forced expiratory volume at 1 s); BMI (body mass index).
a
Physician diagnosed asthma, emphysema, or chronic bronchitis.