Healthcare Glossary

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Bias

When a point of view prevents impartial judgment on issues relating to the subject of that point of view. In clinical studies, bias is controlled by blinding and randomisation. In statistics, there are several elements of bias -
'selection bias', for example, is when particular individuals or groups take part in a research project (a focus group etc), purely because they have a key interest in the topic - this may lead to a predetermined bias, resulting in biased data or samples.

See also:
Clinical trial
Placebo
Placebo-controlled study
Baseline
Blind
Brief Summary
Baseline
Blind (clinical treatment)
Clinical Trial Enrolement
Clinical
Clinical Trial
Cohort
Control Group
Controlled Trial
Diagnostic Trials
Dichotomous Question
Dose-ranging Trial
Double blind Trial
Drop Out
Drug-drug interaction
Effectiveness
Efficacy
Eligibility Criteria
Endpoint
Experimental Drug
Informed Consent
International Clinical Trial Registry Platform (ICTRP)
Methodology
Open label Trial
Phase I Trials
Phase II Trials
Phase III Trials
Phase IV Trials
Placebo
Placebo Effect
Pre-clinical Trials
Prevention Trials
Quality of Life Trials
Randomisation
Randomised Trial
Risk-benefit analysis
Screening Trials
Single-blind Trial
Trial endpoint
Treatment Trials
Adverse Event
Adverse Reaction