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Table 2 Summary of regression analyses for the three disclosure behaviours with intention as dependent variable.

From: The development of a theory-based intervention to promote appropriate disclosure of a diagnosis of dementia

Behaviour

Model

Variables predicting intention

Standardised regression coefficient

Change in R2(%)

Explore what patient already knows or suspects (n = 373)

TPB constructs

Subjective norm

0.424

23.5***

  

Perceived behavioural control

0.161

4.0***

  

Emotional attitude

0.094

1.1*

  

Attitude

0.098

0.8*

  

Total R 2

 

29.4

 

SCT constructs

Self efficacy

0.417

22.0***

  

Outcome expectancies

0.158

2.2**

  

Total R 2

 

24.2

 

Team variables

Perceived reliability of colleagues

0.384

13.1***

  

Perceived role

0.140

1.2**

  

Number of professional groups

-0.113

1.2*

  

Total R 2

 

15.5

 

Combined constructs

Subjective norm

0.334

23.5***

  

Perceived behavioural control

0.213

4.0***

  

Perceived reliability of colleagues

0.252

4.6***

  

Outcome expectancies

0.145

1.9**

  

Number of professional groups responsible for behaviour

-0.128

1.6**

  

Total R 2

 

35.6

Use explicit terminology (n = 366)

TPB constructs

Subjective norm

0.407

38.8***

  

Attitude

0.374

13.1***

  

Emotional attitude

0.143

1.8***

  

Total R 2

 

53.7

 

SCT constructs

Outcome expectancies

0.470

40.1***

  

Self efficacy

0.316

7.4***

  

Total R 2

 

47.5

 

Team variables

Perceived reliability of colleagues

0.566

37.6***

  

Perceived role

0.220

4.6***

  

Total R 2

 

42.2

 

Combined constructs

Outcome expectancies

0.422

40.1***

  

Perceived reliability of colleagues

0.284

15.8***

  

Subjective norm

0.183

3.7***

  

Self efficacy

0.154

1.8***

  

Perceived role

0.127

1.3***

  

Emotional attitude

-0.133

0.8**

  

Total R 2

 

63.5

Explore what diagnosis means to patient (n = 371)

TPB constructs

Subjective norm

0.434

36.4***

  

Perceived behavioural control

0.389

12.2***

  

Total R 2

 

48.6

 

SCT constructs

Self efficacy

0.470

29.4***

  

Outcome expectancies

0.149

1.7**

  

Total R 2

 

31.1

 

Team variables

Perceived reliability of colleagues

0.349

10.8***

  

Perceived role

0.269

7.2***

  

Total R 2

 

18.0

 

Combined constructs

Subjective norm

0.334

36.3***

  

Perceived behavioural control

0.296

12.3***

  

Self efficacy

0.161

1.9***

  

Perceived role

0.127

1.2**

  

Perceived reliability of colleagues

0.109

1.0**

  

Total R 2

 

52.7

  1. * p < 0.05; ** p < 0.01; *** p < 0.001. These significance levels are associated with the increase in R2 as explanatory variables are added stepwise to the regression models. The variable that explained the greatest amount of variation in intention was added first. On subsequent steps the variable that explained the greatest amount of the residual variation was added provided that the improvement in the fit of the model was significant at the 5% level