Comparison of demographic factors between community COPD-positive and community COPD-negative participants.
| COPD negative (63.0%, n=34) | COPD positive (37.0%, n=20) | P values | |
| Demographics: % (n) or mean (SD) | |||
| Age (years) | 45.7 (8.92) | 54.9 (13.6) | 0.004 |
| Being female | 64.7% (22) | 40.0% (8) | 0.08 |
| Body mass index (kg/m2) | 26.4 (5.01) | 20.0 (2.99) | <0.001 |
| Primary education or less | 76.5% (26) | 95.0% (19) | 0.08 |
| Household size >3 people | 82.4% (28) | 50.0% (10) | 0.012 |
| Risk factors: % (n) | |||
| Current smoking | 2.9 (1) | 30.0 (6) | 0.004 |
| Obesity (body mass index ≥30 kg/m2) | 26.5 (9) | 0 (0) | 0.012 |
| Self-reported HIV | 3.5 (1) | 14.3 (2) | 0.19 |
| Self-reported tuberculosis | 3.9 (1) | 20.0 (3) | 0.09 |
| Household biomass use | 97.1 (33) | 100 (20) | 0.44 |
| Prebronchodilator spirometry: mean (SD) | |||
| FEV1 (L) | 2.50 (0.47) | 1.57 (0.80) | <0.001 |
| % Predicted | 0.92 (0.13) | 0.62 (0.23) | <0.001 |
| FVC (L) | 3.12 (0.50) | 2.68 (1.16) | 0.06 |
| % Predicted | 0.93 (0.11) | 0.84 (0.24) | 0.05 |
| FEV1/FVC ratio | 80.1 (6.69) | 57.5 (9.98) | <0.001 |
| % Predicted | 0.99 (0.08) | 0.72 (0.12) | <0.001 |
| Symptoms: % (n) | |||
| Cough | 9.1 (3) | 35.0 (7) | 0.019 |
| Phlegm | 10.7 (3) | 5.3 (1) | 0.51 |
| Wheeze | 7.1 (2) | 10.5 (2) | 0.68 |
| Dyspnoea with exertion | 14.3 (4) | 26.3 (5) | 0.30 |
P value represents results from t-test or Χ2 test.
COPD, chronic obstructive pulmonary disease; FEV1, forced expiratory volume in 1 s; FVC, forced vital capacity.