Table 1 Personal characteristics in a population-based sample of 2,113 U.S. adults aged 55 to 75 years
From: Lifetime environmental tobacco smoke exposure and the risk of chronic obstructive pulmonary disease
Characteristic | COPD (n = 386) | No COPD (n = 1,727) | P value |
|---|---|---|---|
Age (years) | 64.3 (6.2) | 63.9 (6.1) | 0.24 |
Gender (female) | 246 (64%) | 961 (56%) | 0.004 |
Race-ethnicity (white) | 337 (87%) | 1495 (87%) | 0.70 |
Married or cohabitating | 186 (48%) | 1080 (63%) | <0.0001 |
Educational attainment | Â | Â | <0.0001 |
   High school degree | 207 (54%) | 709 (41%) |  |
   Some college | 105 (27%) | 529 (31%) |  |
   College or graduate degree | 74 (19%) | 489 (28%) |  |
Cigarette smoking | Â | Â | <0.0001 |
   Current smoker | 127 (33%) | 279 (16%) |  |
   Past smoker | 184 (48%) | 685 (40%) |  |
   Never smoker | 75 (19%) | 763 (44%) |  |