| Model 1 (Block 1) | Model 2 (Block 1 and 2) | Model 3 (Block 1 and 3) | |||
---|---|---|---|---|---|---|
 | R2 | β | R2 | β | R2 | β |
Block 1: Perceptions | .53 | Â | .54 | Â | .56 | Â |
Consequences | Â | .26* | Â | .26 | Â | .21 |
Timeline |  | .01 |  | –.01 |  | –.03 |
Personal control | Â | .03 | Â | .02 | Â | .04 |
Treatment control |  | –.11 |  | –.16 |  | –.15 |
Identity | Â | .43** | Â | .44** | Â | .42** |
Illness concern |  | .02 |  | .03 |  | –.01 |
Comprehensibility |  | –.16* |  | –.13 |  | –.16* |
Emotional response | Â | .16 | Â | .09 | Â | .13 |
Block 2: Demographic characteristics | Â | Â | Â | Â | Â | Â |
Age | Â | Â | Â | .06 | Â | Â |
Gender | Â | Â | Â | .10 | Â | Â |
Block 3: Clinical characteristics | Â | Â | Â | Â | Â | Â |
MRC dyspnoea | Â | Â | Â | Â | Â | .23** |
FEV%pred | Â | Â | Â | Â | Â | .01 |
Comorbidity |  |  |  |  |  | –.10 |
F change model | Â | 13.9*** | Â | 1.00 | Â | 2.3*** |