Table 2.
Subject characteristics
| Characteristics | All (N=309) |
|---|---|
| Age, years | 65.6±11.1 |
| Male | 66.7% |
| BMI, kg/m2 | 27±7.1 |
| Caucasian | 85.8% |
| Current smokers | 62.4% |
| Former smokers | 21.9% |
| Never smokers | 15.6% |
| Unknown smoking status | 23.3% |
| Pack-year tobacco smoking | 51.3±31.6 |
| FEV1 | 1.57±0.68 |
| FEV1, % predicted | 54.4±21.5 |
| FVC | 2.89±0.92 |
| FVC, % predicted | 78.1±19.9 |
| FEV1/FVC ratio (%) | 54.8±16.1 |
| Creatinine | 85.2±69.3 |
| NT-proBNP | 413 (174, 1,243) |
| CRP | 26.6 (5.5, 70.7) |
| CHF | 16.2% |
| CAD | 21.0% |
| Hypertension | 46.0% |
| Diabetes mellitus | 16.5% |
| Arrhythmia | 13.9% |
| Congenital heart disease | 0.32% |
| Asthma | 24.6% |
| History of MI | 17.5% |
Note: Data are represented as mean ± SD or median and IQR or (%).
Abbreviations: BMI, body mass index; FEV1, forced expiratory volume in 1 second; FVC, forced vital capacity; NT-proBNP, N-terminal prohormone brain natriuretic peptide; CRP, C-reactive protien; CHF, congestive heart failure; CAD, coronary artery disease; MI, myocardial infarction; IQR, interquartile range.