Table 2– Associations between Short Form (SF)-12 physical component score (PCS) and mental health component score (MCS) with chronic obstructive pulmonary disease (COPD) defined as having a post-bronchodilator forced expiratory volume in 1s (FEV1)/forced vital capacity (FVC) <0.70.
| PCS SF-12 | MCS SF-12 | |
| No COPD | Reference | Reference |
| COPD (FEV1/FVC <0.70) | ||
| Grade 1 | -0.19 (-0.78–0.39) | 0.07 (-0.55–0.69 |
| Grade 2 | -3.0 (-3.6– -2.4) | -1.4 (-2.1– -0.77) |
| Grade 3 | -7.8 (-8.9– -6.7) | -3.1 (-4.3– -2.0) |
| Grade 4 | -11 (-14– -8.9) | -5.2 (-8.1– -2.3) |
| Age per 10 years | -1.2 (-1.6– -0.8) | 0.84 (0.67–1.0) |
| Females compared with males | -2.0 (-2.3– -1.6) | -2.2 (-2.5– -1.8) |
| Years of education per year | 0.23 (0.19–0.28) | 0.05 (0.00–0.10) |
| Smoking history | ||
| Never | Reference | Reference |
| Ex | -0.39 (-0.77– -0.01) | -0.38 (-0.79–0.03) |
| Current | -1.8 (-2.2– -1.3) | -1.8 (-2.3– -1.3) |
| Body mass index kg·m−2 | ||
| <20 | -1.0 (-1.7– -0.37) | -1.0 (-1.8– -0.32) |
| 20–25 | Reference | Reference |
| >25–30 | -0.54 (-0.92– -0.15) | 0.05 (-0.36–0.46) |
| >30 | -2.9 (-3.3– -2.4) | 0.05 (-0.43–0.54) |
| Comorbidities | ||
| Heart disease | -3.1 (-3.6– -2.6) | -0.78 (-1.3– -0.26) |
| Hypertension | -1.2 (-1.6– -0.85) | -0.80 (-1.2– -0.41) |
| Diabetes | -2.7 (-3.3– -2.1) | -0.76 (-1.4– -0.10) |
| Stroke | -4.5 (-5.4– -3.5) | -0.23 (-1.2–0.77) |
Data are adjusted for the variables in the table and centre are presented as adjusted estimates (95% confidence interval).