Browse the glossary:

• validity see low risk of bias (internal validity)
  — In studies of treatment effects, the extent to which the design and conduct of a study eliminates or reduces bias; … (read more)
• value (patient preferences, , relative importance of outcomes, utility utility values, values and preferences)
  — In recommendations or decisions about treatments, the degree to which the people affected by a treatment choice value each of the outcomes in relation to the other outcomes; … (read more)
• variables (characteristics, entities)
  — Any measurable characteristic that varies; … (read more)
• very low certainty of the evidence (very low confidence in the effect estimate, very low quality of the evidence, very low strength of the evidence)
  — The research does not provide a reliable indication of the likely effect. The likelihood that the actual effect will be substantially different is very high; … (read more)