Research Methods & Study Design

A study designed to prevent knowledge of treatment assignment from influencing results. In a single-blind trial, only the participant doesn’t know which treatment they received. In a double-blind trial, neither participants nor researchers know until the study ends.

A flaw in how a study is designed or conducted that skews the results away from the truth. It can come from poor methodology or from factors outside the researcher’s control.

A short summary at the start of a research paper that tells readers what the study is about, how it was done, and what was found — helping them decide if the full paper is relevant to them.

A framework for structuring clinical research questions, building on PICO (Population, Intervention, Comparator, Outcomes) by adding Context — the specific setting or circumstances in which the intervention is applied.

A standardized OMERACT tool that concisely presents key evidence about an outcome measure‘s performance ‚Äî covering truth, discrimination, and feasibility ‚Äî making it easier to compare instruments and determine readiness for Core Outcome Sets.

A step-by-step tool guiding researchers through the process of selecting appropriate measurement instruments, systematically evaluating each against the OMERACT Filter criteria in a transparent, evidence-based way.