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Table 4 Regression models between various illness perception items and dependent variable health-related quality of life (CCQ) N = 86

From: Perceived quality of life in chronic obstructive pulmonary disease patients: a cross-sectional study in primary care on the role of illness perceptions

 

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

 

.54

 

.56

 

Consequences

 

.26*

 

.26

 

.21

Timeline

 

.01

 

–.01

 

–.03

Personal control

 

.03

 

.02

 

.04

Treatment control

 

–.11

 

–.16

 

–.15

Identity

 

.43**

 

.44**

 

.42**

Illness concern

 

.02

 

.03

 

–.01

Comprehensibility

 

–.16*

 

–.13

 

–.16*

Emotional response

 

.16

 

.09

 

.13

Block 2: Demographic characteristics

      

Age

   

.06

  

Gender

   

.10

  

Block 3: Clinical characteristics

      

MRC dyspnoea

     

.23**

FEV%pred

     

.01

Comorbidity

     

–.10

F change model

 

13.9***

 

1.00

 

2.3***

  1. R2 is an adjusted R2. β is a standardised β.
  2. *P ≤ 0.05; ** P ≤ 0.01; *** p < 0.001.
  3. FEV%pred = forced expiratory volume percentage from predicted, MRC dyspnoea = Medical Research Council dyspnoea scale.