Research Methods & Study Design

The factors — such as individual differences, measurement error, or environmental changes — that cause variation in data or outcomes. Identifying and controlling these is essential for producing reliable and reproducible results.

A small, focused discussion session at an OMERACT conference where participants with a shared interest in a specific topic come together to discuss ideas, network, and explore areas for future work.

The collection of factors — such as population, intervention, comparator, and context — that define where and how a Core Outcome Set or study applies. Clearly defined settings ensure relevance and appropriate targeting.

A broad form of evidence synthesis that maps and summarizes the existing research on a topic, identifying key concepts, gaps in knowledge, and areas for future investigation — without the narrow focus of a systematic review.

An outcome measure capturing patients’ experience of treatment-related side effects in clinical trials ‚Äî including the severity, frequency, and daily impact of symptoms from the patient‘s perspective.

The likelihood that a study contains systematic errors that may distort its results. High risk of bias undermines confidence in findings; low risk increases their credibility.

Individuals who systematically investigate questions to generate new knowledge, validate theories, or develop solutions — working in academic, clinical, governmental, or industry settings.

The degree to which a measurement method produces consistent, stable results when repeated under the same conditions. High reliability means findings are dependable and not due to random error.

Relating to the rules, standards, and oversight processes — typically by government agencies — that ensure health products and research meet safety, efficacy, and ethical requirements.

Clinical evidence about the benefits and risks of a treatment derived from real-world practice data, outside the controlled conditions of a clinical trial — used to assess effectiveness in routine care.