| Model 1 (Block 1) | Model 2 (Block 1–2) | Model 3 (Block 1–3) | Model 4 (Block 1–4) | ||||
---|---|---|---|---|---|---|---|---|
R2 | β | R2 | β | R2 | β | R2 | β | |
Block 1 | ||||||||
 Illness perception | 0.452 |  | 0.447 |  | 0.554 |  | 0.582 |  |
  Identity |  | −0.12 |  | −0.12 |  | −0.02 |  | −0.01 |
  Consequences |  | −0.22* |  | − 0.21* |  | − 0.07 |  | −0.03 |
  Treatment control |  | −0.02 |  | −0.03 |  | − 0.03 |  | − 0.01 |
  Personal control |  | 0.07 |  | 0.09 |  | 0.03 |  | 0.01 |
  Illness coherence |  | 0.19* |  | 0.19* |  | 0.18* |  | 0.12 |
  Timeline (cyclical) |  | −0.06 |  | −0.07 |  | 0.04 |  | 0.03 |
  Emotional representation |  | −0.34** |  | −0.31** |  | −0.26* |  | −0.27* |
Block 2 | ||||||||
 Demographic characteristics | ||||||||
  Age |  |  |  | 0.08 |  | 0.10 |  | 0.08 |
  Monthly net income |  |  |  | 0.02 |  | 0.03 |  | 0.02 |
Block 3 | ||||||||
 Clinical characteristics | ||||||||
  Additional medication |  |  |  |  |  | −0.02 |  | −0.02 |
  Co-morbidity |  |  |  |  |  | −0.09 |  | −0.07 |
  Disease activity |  |  |  |  |  | 0.08 |  | 0.13 |
  Pain |  |  |  |  |  | −0.12 |  | −0.15 |
  Functional disability |  |  |  |  |  | −0.10 |  | −0.11 |
  Fatigue |  |  |  |  |  | −0.33** |  | −0.36** |
Block 4 | ||||||||
 Social support | ||||||||
  Positive support |  |  |  |  |  |  |  | 0.19 |
  Detrimental interaction |  |  |  |  |  |  |  | −0.10 |
R2 change | Â | Â | Â | 0.43 | Â | 0.55 | Â | 0.58 |