On 28 Nov 2019, at 17:59, James Megna <[log in to unmask]> wrote:

...a common internal validity shortcoming is failure to control for multiple tests of clinical significance...

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James L. Megna, MD, PhD, DFAPA

Professor

Departments of Psychiatry, Medicine, and Public Health and Preventive Medicine

SUNY Upstate Medical University

750 E. Adams Street

Syracuse, NY 13210

tel.#315-464-9102

fax#315-464-9101

>>> K Hopayian <[log in to unmask]> 11/28/19 12:23 PM >>>

Dear Colleagues

When teaching appraisal of internal validity, it helps to give real examples with flaws (biases). It is quite easy to find flawed examples for most aspects of a study but when it comes to analysis most examples I have are limited: (lack of) Intention to Treat and failure to adjust for possible confounders. What is more, they are getting old now. Does anyone have examples they could share?

Or does doing so count as “flaw shaming”? ;–)

Kev

Prof. Kev (Kevork) Hopayian, 
BSc, MB BS, MD, FRCGP, DCH, DRCOG
Clinical Professor, University of Nicosia, Cyprus

RCGP [INT] Member

Sessional GP, Suffolk

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