Table 3– 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 1 s (FEV1)/forced vital capacity (FVC) predicted below the lower limit of normal (LLN).
| PCS SF-12 | MCS SF-12 | |
| No COPD | Reference | Reference |
| COPD (FEV1/FVC <LLN) | ||
| Grade 1 | -0.26 (-1.05–0.53) | -0.28 (-1.13–0.56) |
| Grade 2 | -3.2 (-3.9– -2.5) | -1.2 (-1.9– -0.44) |
| Grade 3 | -7.9 (-9.0– -6.8) | -2.9 (-4.1– -1.7) |
| Grade 4 | -12 (-14– -8.8) | -5.1 (-8.0– -2.2) |
Data are presented as adjusted estimates (95% confidence interval). Estimates are adjusted for age, sex, educational level, smoking history, body mass index, cardiovascular diseases, diabetes and centre.