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Table 3 Post-intervention descriptive statistics, correlations of process variables with intention and behavioural simulation & regression analyses by theory.

From: An intervention modelling experiment to change GPs' intentions to implement evidence-based practice: using theory-based interventions to promote GP management of upper respiratory tract infection without prescribing antibiotics #2

Model Process (explanatory) variables N items Alpha Mean (SD) Behavioural intention Behavioural simulation
      r* B Beta Model summary R2(adj) r* B Beta Model summary R2(adj)
TPB Attitude direct 3 0.55 16.9 (2.9) 0.456**** 0.301**** 0.267   0.23****    
  Attitude Indirect 8 - 205.6 (36.1) 0.364**** 0.017**** 0.195   0.08ns    
  Subjective Norm 5 - 97.2 (36.7) 0.226**** 0.014*** 0.157   0.07ns    
  PBC direct 3 0.64 11.9 (3.5) 0.082ns -0.018ns -0.020   0.108** 0.026ns 0.055  
  PBC indirect 6 0.79 26.3 (5.6) 0.388**** 0.153**** 0.266 0.33 0.319**** 0.076**** 0.258  
  Behavioural intention 4 0.83 0.01 (3.2)      0.307**** 0.108**** 0.210 0.14
SCT Risk Perception (same as anticipated consequences) 3 0.61* 16.6 (2.8) 0.441**** 0.344**** 0.298   0.191**** 0.029** 0.144  
  Outcome Expectancies (same as attitude indirect) 8 - 205.6 (36.1) 0.364**** 0.017**** 0.190   0.105** -0.034ns -0.087  
  Self Efficacy 6 0.88 29.2 (5.4) 0.411**** 0.178**** 0.294 0.32 0.391**** 0.122**** 0.391 0.17
OLT Anticipated consequences 3 0.61 16.6 (2.8) 0.441**** 0.257**** 0.224   0.197**** 0.026ns 0.102  
  Evidence of habit 2 0.61 11.4 (2.1) 0.746**** 1.048**** 0.671 0.60 0.294**** 0.202**** 0.251 0.10
Post-intentional variables            
II Prior planning 1 - 5.8 (1.0)      0.343**** 0.545**** 0.332 0.12
  Action planning 3 0.92 16.5 (3.0)      0.216**** 0.114**** 0.206 0.05
Cross-theory analysis (variables retained in regression models)            
TPB Attitude direct      0.102** 0.101      
  Subjective Norm      0.010*** 0.117      
SCT/OLT Risk Perception/Anticipated consequences      0.194**** 0.168      
OLT Evidence of habit      0.948**** 0.605      
SCT Self-efficacy      0.061** 0.090 0.63 0.393**** 0.091**** 0.294  
II Prior planning         0.343**** 0.326**** 0.198 0.18
  1. * = Pearson correlation coefficient. **p < 0.05. ***p = 0.001. ****p < 0.001. ns = non-significant