Here is a list of all Biases in the Catalogue. Check back regularly as we are adding new ones over time.
Publication of research findings in a particular language.
An innocent exposure may become suspicious if, rather than causing disease, it causes a benign disorder which resembles the disease.
Occurs when a study participant is categorised into an incorrect category altering the observed association or research outcome of interest.
Differences in the timing of selection of case and controls within in a study influence exposures and outcomes resulting in biased estimates.
A bias that occurs due to systematic differences between responders and non-responders
The tendency for an intervention to appear better when it is new.
The process of observing and recording information which includes systematic discrepancies from the truth.
When authors restrict their references to only those works that support their position.
The selective reporting of pre-specified outcomes in published clinical trials.
When only a proportion of the study group receive both the index and reference standard test when investigating for diagnostic accuracy.
The tendency to be subjective about people and events, causing biased information to be collected in a study or biased interpretation of a study’s results.
Systematic differences in the care provided to members of different study groups other than the intervention under investigation
Differences in the uptake of healthcare as a result of a public interest in a disease or condition and its possible causes results in a biased study sample
The tendency to submit, accept and publish positive results rather than non-significant or negative results.
Exclusion of individuals with severe or mild disease resulting in a systematic error in the estimated association or effect of an exposure on an outcome.