Research Methods & Study Design

An OMERACT working group focused on improving the methods used to develop, validate, and implement Core Outcome Sets — rather than on a specific disease — to ensure rigor and consistency across all OMERACT initiatives.

The overall framework of principles and procedures guiding how research is designed, conducted, and analyzed, ensuring that findings are valid, reliable, and applicable to the question being studied.

A researcher who specializes in developing and applying rigorous research methods — including study design, measurement, and statistical analysis — to ensure findings are valid and reliable.

The key qualities of a measurement instrument that determine how well it works — including construct validity, reliability (inter-method and test-retest), responsiveness, clinical trial discrimination, and thresholds of meaning.

Research designs that observe the same group of people at multiple time points over an extended period — without intervention — to track changes in health status and identify associated factors.

A structured, critical analysis of existing research on a topic, summarizing what is known, identifying patterns and gaps, and pointing to areas needing further study.

An OMERACT Core Area capturing how a disease affects a person’s quality of life ‚Äî including symptoms, physical and emotional functioning, social participation, and the day-to-day burden of living with the condition.

The process of systematically searching databases and other sources to find published research on a specific topic, using defined keywords and criteria to ensure thorough and unbiased coverage.

The specific treatment, procedure, or action being tested in a clinical trial. Participants assigned to receive it form the intervention group, compared to a control group.