Table 1 Demographic and clinical characteristics of the study sample (N = 240 COPD patients)
Variables | Mean/n | SD/% |
|---|---|---|
Sex: male | 240 | |
Age: mean years (SD) | 70.4 | 7.9 |
Lung function: mean (SD) | ||
FEV1 (% predicted)a | 56.0 | 21.7 |
FEV1/FVCb ratio (%) | 56.3 | 12.5 |
Education: counts (%) | ||
Elementary school and below | 158 | 66.11 |
Junior and senior high school | 65 | 27.20 |
Junior college and above | 16 | 6.69 |
Marital status: counts (%) | ||
Married & lives together | 207 | 86.97 |
Other (unmarried, divorce, widower or widow) | 31 | 13.03 |
Current smoking status: yes counts (%) | 66 | 28.21 |
Disease severity: counts (%) | ||
Stage 0 & I: at risk or mild | 39 | 16.25 |
Stage II: moderate | 86 | 35.83 |
Stage III: severe | 95 | 39.58 |
Stage IV: very severe | 20 | 8.33 |