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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-RodrÃguez 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 http://www.angliangp.org > 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] <mailto:[log in to unmask]>] on behalf of Zbys Fedorowicz [[log in to unmask] <mailto:[log in to unmask]>] > Sent: Monday, March 07, 2016 8:33 AM > To: [log in to unmask] <mailto:[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 <http://bahrain.cochrane.org/en/index.html> > > > > From: Evidence based health (EBH) [mailto:[log in to unmask] <mailto:[log in to unmask]>] On Behalf Of Brian Alper MD > Sent: Monday, March 07, 2016 2:12 PM > To: [log in to unmask] <mailto:[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 > www.dynamed.com <http://www.dynamed.com/>, health.ebsco.com <http://health.ebsco.com/> > Twitter: @BrianAlperMD > > USEFUL make it before DynaMed you call it ... https://www.linkedin.com/pulse/useful-brian-alper <https://www.linkedin.com/pulse/useful-brian-alper> > > > From: Evidence based health (EBH) [mailto:[log in to unmask] <mailto:[log in to unmask]>] On Behalf Of Kev Hopayian > Sent: Monday, March 07, 2016 4:39 AM > To: [log in to unmask] <mailto:[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 > http://www.angliangp.org <http://www.angliangp.org/> > 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 > http://www.angliangp.org <http://www.angliangp.org/> > > ----------------------------------------- CONFIDENTIALITY NOTICE: This email and any attachments may contain confidential information that is protected by law and is for the sole use of the individuals or entities to which it is addressed. If you are not the intended recipient, please notify the sender by replying to this email and destroying all copies of the communication and attachments. Further use, disclosure, copying, distribution of, or reliance upon the contents of this email and attachments is strictly prohibited. To contact Albany Medical Center, or for a copy of our privacy practices, please visit us on the Internet at www.amc.edu <http://www.amc.edu/>.