a worked example of using the COSMIN checklist, Terwee-m statistical quality criteria, and the levels of evidence synthesis using the method of Schellingerhout and colleagues (2012). This paper will aid users and reviewers of questionnaires in the quality appraisal and selection of appropriate instruments by presenting the checklist that contains requirements for the gener-alisability of the results (8 items). It is important to assess the quality of the COSMIN checklist itself. For example, it is important that differ-ent researchers, who use the COSMIN checklist to rate the same article, give the same ratings on each item. Data required to complete the COSMIN checklist assessment were also extracted. Appraising Methodological Quality The 4-point COSMIN checklist was used to evaluate the methodological quality of studies, this evaluation is important as low-quality studies are considered to have a high risk of biased results. The checklist consists of nine measurement PDF - Aim of the COSMIN study (COnsensus-based Standards for the selection of health status Measurement INstruments) was to develop a consensus-based checklist to evaluate the methodological quality of studies on measurement properties. We present the COSMIN checklist and the agreement of the panel on the items of the checklist. A four-round Delphi study was performed with international according to the COSMIN checklist K Thorborg,1 P Hölmich,1 R Christensen,2,3 J Petersen,1 EM Roos,2 1Arthroscopic Centre Amager, Amager Hospital, Faculty of Health Sciences, University of Copenhagen, Copenhagen, Denmark; (COSMIN) recommendations, for use in young to middle-aged, physically active patients with longstanding hip and/or groin The COSMIN checklist (COnsensus-based Standards for the selection of health status Measurement INstruments) was developed in an international Delphi study to evaluate the methodological quality of studies on measurement properties of health-related patient reported outcomes (HR-PROs). In this paper, we explain our choices for the design requirements and preferred statistical methods for which N2 - Background Aim of the COSMIN study (COnsensusbased Standards for the selection of health status Measurement INstruments) was to develop a consensus-based checklist to evaluate the methodological quality of studies on measurement properties. We present the COSMIN checklist and the agreement of the panel on the items of the checklist. COSMIN checklist. Etapa 1. Propriedades de medição avaliadas no artigo. Consistência interna Caixa 1 Confiabilidade Caixa 2 Erro de medição Caixa 3 Validade do conteúdo Caixa 4 Validade estrutural Caixa 5 Teste de hipóteses Caixa 6 Validade transcultural Caixa 7 Validade do critério Caixa 8 Capacidade de resposta Caixa 9 Interpretabilidade Caixa 10 COSMIN tools The COSMIN initiative has developed the following tools to help researchers and clinicians choosing the most appropriate outcome measurement instrument: 1. COSMIN taxonomy and definitions of measurement properties; 2.COSMIN checklist to evaluate the methodological quality of studies on measurement properties; 3. National Center for Biotechnology Information The COSMIN checklist for assessing the methodological quality of studies on measurement properties of health status measurement instruments: an international Delphi study The COSMIN checklist was developed in a multidisciplinary, international consensus‐study in which 43 experts in health status measurement from all over