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Table 3 Instruments and variables.

From: Blood test ordering for unexplained complaints in general practice: the VAMPIRE randomised clinical trial protocol. [ISRCTN55755886]

Instrument

Variables

Time points

Population

Method

  

T0

T1#

T1.5#

T6

T12

 

- Provision

- Person who completes questionnaire

(- Comments)

GPs' background data

Personal data

x

    

All GPs

- By mail

 

Practice characteristics

x

     

- GP

 

CME

x

      
 

Laboratory facilities available in practice

x

      

Complaint registration form (for each individual type of complaint)

Symptoms

x

x

   

All patients

- Present in practice

 

Signs

x

x

    

- GP

 

Working hypothesis

x

x

     
 

Degree of unexplainedness

x

x

     
 

Degree of suspicion of serious pathology

x

x

     
 

Degree of insecurity of GP

x

x

     
 

Satisfaction of GP

x

x

     

Patients' background data (included in patient questionnaire)

Date of birth

x

x

x

x

x

All patients

- Handed out by GP (T0, T1)

 

Country of birth

x

x

x

x

x

 

- By mail (T1.5-T12)

 

Sex

x

x

x

x

x

 

- Patient

 

Marital status

x

x

x

x

x

  
 

Type of health insurance

x

x

x

x

x

  
 

Level of education

x

x

x

x

x

  

Patient questionnaire

Intensity of complaints

x

x

x

x

x

All patients

- Handed out by GP (T0, T1)

 

Course of complaints

x

x

x

x

x

 

- By mail (T1.5-T12)

 

Satisfaction with care

x

x

    

- Patient

 

Anxiety

x

x

     
 

Quality of life

x

x

x

x

x

  
 

- RAND 36

       
 

- Euroqol thermometer

       
 

Utilisation of health care

x

x

x

x

x

  

Test ordering form

Quality of test ordering

x*

x*

   

All patients

- Present in practice

 

Quantity of test ordering

x

x

    

- GP

Test result form

Test results

x*

x*

   

All patients

- Laboratory

        

- Laboratory staff

Record examination form

Final diagnosis

    

x

All patients

- Practice/university

 

Utilisation of health care

    

x

 

- Researcher

 

Use of watchful waiting strategy

    

x

  
  

Meeting 1

Meeting 2

Practice visit

  

Reports of small group meetings

Participation

x

x

 

All GPs in intervention group

- Meeting room

 

Learning effects

x

x

  

- Researcher

Evaluation forms of small group meetings

Valuation of programme

x

x

 

All GPs in intervention group

- Meeting room

 

Learning effects

x

x

  

- Researcher

 

Suggestion for improvement

x

x

   

GP interview in practice

Barriers and facilitators during change

    

x

All GPs in intervention group

- Practice

 

Stages of change

    

x

 

- GP

Cost registration

Costs of development and organising of strategy

x

x

x

 

- University

        

- Researcher

  1. * T0 for patients randomised to group 1, T1 for all patients but only if they revisit their GP
  2. # T1 is the time point to measure a follow-up visit by the patient 4 weeks after inclusion. If a patient does not return to the GP, a questionnaire is sent by mail after 6 weeks. This time point is indicated as T1.5.
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