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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)
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)
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 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)
OBJECTIVE Our purpose was to measure the agreement, reliability, construct validity, and feasibility of a measurement tool to assess systematic reviews (AMSTAR). STUDY DESIGN AND SETTING We randomly selected 30 systematic reviews from a database. Each was assessed by two reviewers using: (1) the enhanced quality assessment questionnaire (Overview of(More)
BACKGROUND Although guidelines for critical appraisal of diagnostic research and meta-analyses have already been published, these may be difficult to understand for clinical researchers or do not provide enough detailed information. METHODS Development of guidelines based on a systematic review of the evidence in reports of systematic searches of the(More)
OBJECTIVE This meta-analysis was undertaken to obtain insight regarding the shape and strength of the relationship between alcohol consumption and the risk of type 2 diabetes, the effects of adjustment for confounders, and the effect of modification by type 2 diabetes definition, sex, and BMI. RESEARCH DESIGN AND METHODS The 15 original prospective cohort(More)
BACKGROUND Lateral epicondylitis is generally treated with corticosteroid injections or physiotherapy. Dutch clinical guidelines recommend a wait-and-see policy. We compared the efficacy of these approaches. METHODS Patients with lateral epicondylitis of at least 6 weeks' duration were recruited by family doctors. We randomly allocated eligible patients(More)
Patients with lateral epicondylitis (tennis elbow) are frequently treated with corticosteroid injections, in order to relieve pain and diminish disability. The objective of this review was to evaluate the effectiveness of corticosteroid injections for lateral epicondylitis. Randomised controlled trials (RCTs) were identified by a highly sensitive search(More)
Neck pain occurs frequently in western societies. In the majority of cases, no specific cause can be identified. In order to gain insight into the clinical course and prognostic factors of non-specific neck pain, a systematic review was conducted. A computerized literature search was carried out to identify observational studies on non-specific neck pain(More)