DCAF, 
Thanks to all. I think incorporation bias captures the concept best.  It is more precise than the more general selection bias. Interestingly, I could not find this term in one of the proposed classifications of bias Delgado-Rodríguez M, Llorca J. Bias. J Epidemiol Community Health. 2004;58(635-641).
Kev

Dr Kev (Kevork) Hopayian, 
MD FRCGP
General Practitioner,  Suffolk,
General Practice Trainer,
Hon Sen Lecturer, Norwich Medical School, University of East Anglia
Primary Care Tutor, East Suffolk
RCGP Clinical Skills Assessment examiner
NHS Senior Appraiser, East Anglia
RCGP International Adviser

On 7 Mar 2016, at 14:29, Mayer, Dan <[log in to unmask]> wrote:

I would call it incorporation bias.  It is similar to the use of a test to define the illness and then measuring the sensitivity of the test.

Dan
From: Evidence based health (EBH) [[log in to unmask]] on behalf of Zbys Fedorowicz [[log in to unmask]]
Sent: Monday, March 07, 2016 8:33 AM
To: [log in to unmask]
Subject: Re: Name that bias

A priori selection bias

 

Prof Zbys Fedorowicz
Director 
The Bahrain Branch of the UK Cochrane Centre
The Cochrane Collaboration
For information on the Bahrain branch see: http://bahrain.cochrane.org/en/index.html

 

 

 

From: Evidence based health (EBH) [mailto:[log in to unmask]] On Behalf Of Brian Alper MD
Sent: Monday, March 07, 2016 2:12 PM
To: [log in to unmask]
Subject: Re: Name that bias

 

Sounds like Selection bias.

 

Brian S. Alper, MD, MSPH, FAAFP
Founder of DynaMed
Vice President of Innovations and EBM Development
Twitter: @BrianAlperMD

 

USEFUL make it before DynaMed you call it ... https://www.linkedin.com/pulse/useful-brian-alper

 

 

From: Evidence based health (EBH) [mailto:[log in to unmask]] On Behalf Of Kev Hopayian
Sent: Monday, March 07, 2016 4:39 AM
To: [log in to unmask]
Subject: Name that bias

 

Hi,
I have sometimes seen cross-sectional studies where a variable (e.g. hyperglycaemia) is one of the inclusion criteria for a study of the prevalence of the same variable in a population (e.g. metabolic syndrome). Not surprisingly, the prevalence would be 100%. Does this self-fulfilling selection bias have a specific name?

 

 

Dr Kev (Kevork) Hopayian, 
MD FRCGP
General Practitioner,  Suffolk,
General Practice Trainer,
Hon Sen Lecturer, Norwich Medical School, University of East Anglia
Primary Care Tutor, East Suffolk
RCGP Clinical Skills Assessment examiner
NHS Senior Appraiser, East Anglia
RCGP International Adviser
Dr Kev (Kevork) Hopayian, 
MD FRCGP
General Practitioner,  Suffolk,
General Practice Trainer,
Hon Sen Lecturer, Norwich Medical School, University of East Anglia
Primary Care Tutor, East Suffolk
RCGP Clinical Skills Assessment examiner
NHS Senior Appraiser, East Anglia
RCGP International Adviser

 

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