Table 2.
Demographic Characteristics in COPD Case and Control Groups
| Characteristics | COPD Group (n=60) | Control Group (n=60) | P-value |
|---|---|---|---|
| Age (y) (Mean±SD) | 63.1±10.1 | 60.0±9.4 | 0.97 |
| BMI (kg/m2) (Mean±SD) | 25.7±4.2 | 24.9±3.3 | 0.57 |
| Gender [n (%)] | 0.07 | ||
| Male | 49 (81.7) | 38 (63.3) | |
| Female | 11 (18.3) | 22 (36.7) | |
| Smoking status [n (%)] | 0.88 | ||
| Non-smoker | 14 (23.3) | 17 (28.3) | |
| Former smoker | 30 (50.0) | 29 (48.3) | |
| Current smoker | 16 (26.7) | 14 (23.3) | |
| Smoking pack-years (Mean±SD) | 8300±4000 | 6200±3200 | 0.21 |
| Quit smoking time (y) (Mean±SD) | 9.6±5.3 | 10.7±5.9 | 0.38 |
| Place of residence [n (%)] | 0.54 | ||
| Urban | 53 (88.3) | 55 (91.6) | |
| Rural | 7 (11.7) | 5 (8.3) | |
| Marriage status [n (%)] | 0.73 | ||
| Single | 5 (8.3) | 4 (6.7) | |
| Married | 55 (91.6) | 56 (93.3) | |
| Living status [n (%)] | 0.70 | ||
| Living alone | 4 (6.7) | 3 (5.0) | |
| Living with family | 56 (93.3) | 57 (95.0) |
Notes: P value obtained from Student’s t-test for continuous variables and Chi-squared test for categorical variables.
Abbreviations: COPD, chronic obstructive pulmonary disease; BMI, body mass index.