Table 1.
Baseline Characteristics of FLOW Cohort of COPD vs. Referent Subjects
| Characteristic | COPD (n=1202) | Referents (n=302) | P value |
|---|---|---|---|
| Age (years) | 58.2 (6.2) | 58.5 (6.2) | 0.50 |
| Sex (female) | 691 (57.4%) | 185 (61%) | 0.23 |
| Race / ethnicity | |||
| White, non-hispanic | 810 (67%) | 200 (66%) | 0.96 |
| African-American | 206 (17%) | 57 (19%) | |
| Asian / Pacific Islander | 35 (3%) | 8 (3%) | |
| Hispanic | 111 (9%) | 28 (9%) | |
| Other | 40 (3%) | 9 (3%) | |
| Smoking history | <0.0001 | ||
| Never smoked | 162 (13%) | 158 (52%) | |
| Current smoker | 393 (33%) | 12 (4%) | |
| Ex-smoker | 644 (54%) | 132 (44%) | |
| Educational attainment | <0.0001 | ||
| High school or less | 352 (29%) | 42 (14%) | |
| Some college | 524 (44%) | 95 (31%) | |
| College /graduate degree | 326 (27%) | 165 (55%) | |
| Household income | <0.0001 | ||
| Low (<$20,000) | 129 (11%) | 9 (3%) | |
| Intermediate ($20 to 80,000) | 699 (58%) | 137 (45%) | |
| High (>$80,000) | 276 (23%) | 133 (44%) | |
| Declined to report | 98 (8%) | 23 (8%) |