Learn More
OBJECTIVES Recently, an increasing number of systematic reviews have been published in which the measurement properties of health status questionnaires are compared. For a meaningful comparison, quality criteria for measurement properties are needed. Our aim was to develop quality criteria for design, methods, and outcomes of studies on the development and(More)
OBJECTIVE Lack of consensus on taxonomy, terminology, and definitions has led to confusion about which measurement properties are relevant and which concepts they represent. The aim was to clarify and standardize terminology and definitions of measurement properties by reaching consensus among a group of experts and to develop a taxonomy of measurement(More)
BACKGROUND Our objective was to develop an instrument to assess the methodological quality of systematic reviews, building upon previous tools, empirical evidence and expert consensus. METHODS A 37-item assessment tool was formed by combining 1) the enhanced Overview Quality Assessment Questionnaire (OQAQ), 2) a checklist created by Sacks, and 3) three(More)
BACKGROUND 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. METHODS A four-round(More)
STUDY DESIGN Literature review, expert panel, and a workshop during the "VIII International Forum on Primary Care Research on Low Back Pain" (Amsterdam, June 2006). OBJECTIVE To develop practical guidance regarding the minimal important change (MIC) on frequently used measures of pain and functional status for low back pain. SUMMARY OF BACKGROUND DATA(More)
BACKGROUND The COSMIN checklist is a standardized tool for assessing the methodological quality of studies on measurement properties. It contains 9 boxes, each dealing with one measurement property, with 5-18 items per box about design aspects and statistical methods. Our aim was to develop a scoring system for the COSMIN checklist to calculate quality(More)
BACKGROUND Reproducibility concerns the degree to which repeated measurements provide similar results. Agreement parameters assess how close the results of the repeated measurements are, by estimating the measurement error in repeated measurements. Reliability parameters assess whether study objects, often persons, can be distinguished from each other,(More)
CONTEXT Human adipose tissue expresses and releases the proinflammatory cytokine interleukin 6, potentially inducing low-grade systemic inflammation in persons with excess body fat. OBJECTIVE To test whether overweight and obesity are associated with low-grade systemic inflammation as measured by serum C-reactive protein (CRP) level. DESIGN AND SETTING(More)
STUDY DESIGN Descriptive method guidelines. OBJECTIVES To help reviewers design, conduct, and report reviews of trials in the field of back and neck pain. SUMMARY OF BACKGROUND DATA In 1997, the Cochrane Collaboration Back Review Group published method guidelines for systematic reviews. Since its publication, new methodologic evidence emerged and more(More)
OBJECTIVES To determine the intra- and interrater reliability of the Action Research Arm (ARA) test, to assess its ability to detect a minimal clinically important difference (MCID) of 5.7 points, and to identify less reliable test items. DESIGN Intrarater reliability of the sum scores and of individual items was assessed by comparing (1) the ratings of(More)