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Before the actual observer study, 60 training cases were presented to the non-radiologists.
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Because their assessments of the mammographic cases in this retrospective observer study would not affect patient care, their decisions could be different from those in an actual clinical setting.
Results of studies evaluating the effects of CAD on actual observers' performances are not homogeneous and range from significant improvement [ 2, 7, 8] to lack of any impact [ 9]. Results seem to be influenced by the type of CAD algorithm used, reader experience and the conspicuity of the study lesions.
We conducted a multi-centre observer-study.
Two independent blinded observers studied the photographs of the tongues.
Further validity of the factors could be tested by comparing scores with observational studies of actual performance requiring external teams of observers or mystery patients.
Furthermore, pre-tests had been done before the start of the actual observations to ensure accurate and consistent performance of the observer.
The observers were aware of the fact that the actual study was done on FOBT positive patients.
Finding actual subjects to study was daunting.
But the actual study was subtle.
Methods: Retrospective, single centre, observer blinded study design.
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Justyna Jupowicz-Kozak
CEO of Professional Science Editing for Scientists @ prosciediting.com