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Assessing Quality of Individual Studies Quiz
- 1. Assessing Quality of Individual Studies Interactive Quiz Prepared for: The Agency for Healthcare Research and Quality (AHRQ) Training Modules for Systematic Reviews Methods Guide www.ahrq.gov
Editor's Notes
- Assessing Quality of Individual Studies Interactive Quiz
- Quality Assessment in a Systematic Review Quality assessment is used at several steps in a systematic review. Some uses are required and some are optional. For which steps is quality assessment required? Correct. All reviews must use quality assessment for interpreting results of individual studies and for grading the body of evidence. Based on the topic and a priori assessment of evidence gaps, some reviews may also exclude poor-quality studies from the review or from meta-analyses. Incorrect. All reviews must use quality assessment for interpreting results of individual studies and for grading the body of evidence. Based on the topic and a priori assessment of evidence gaps, some reviews may also exclude poor-quality studies from the review or from meta-analyses. Incorrect. All reviews must use quality assessment for interpreting results of individual studies and for grading the body of evidence. Based on the topic and a priori assessment of evidence gaps, some reviews may also exclude poor-quality studies from the review or from meta-analyses.
- Steps in Quality Assessment The process of quality assessment involves which series of steps? Incorrect. Although reviewers may have a sense of overall quality before assessing individual sources of bias, transparency of process is critical. Each predefined source of bias should be evaluated and recorded when reviewers arrive at an overall quality rating. Reviewers should identify study design, evaluate general and design-specific sources of bias based on a priori criteria, and use these assessments to arrive at an overall quality rating. Incorrect. Although reviewers may have a sense of overall quality before assessing individual sources of bias, transparency of process is critical. Each predefined source of bias should be evaluated and recorded when arriving at an overall quality rating. Reviewers should identify study design, evaluate general and design-specific sources of bias based on a priori criteria, and use these assessments to arrive at an overall quality rating. Correct. Study design is an important element of quality, but the conduct of the study is equally important. Although reviewers may have a sense of overall quality before assessing individual sources of bias, transparency of process is critical. Each predefined source of bias should be evaluated and recorded when arriving at an overall quality rating.
- What Are the Best Tools To Evaluate Quality? In choosing a tool to evaluate quality, what is the most important consideration? Incorrect. Although reviewers may prefer tools that they have used in the past, they should first reevaluate those tools to ensure that they cover key sources of bias before they rely on familiar tools. Correct. Although reviewers may prefer tools that are familiar and/or short, they should reevaluate those tools to ensure that they cover key sources of bias. Incorrect. Although reviewers may prefer tools with fewer items, they should reevaluate those tools to ensure that they cover key sources of bias before they rely on shorter tools.
- What To Describe in Quality Assessment When reporting quality assessment, what must systematic reviewers describe? Incorrect. Although quality criteria should be selected a priori and described fully, this information is not sufficient for the reader to understand how sources of bias may have influenced the overall quality rating. Quality assessment requires transparency at all stages. Correct. Identify criteria for evaluating sources of bias a priori . Report fully on all elements of quality for each individual study. Describe operationalism of every criterion. Report process for conflict resolution between raters. Accompany the overall quality rating (good, fair, or poor) with explanatory text. Incorrect. Quality criteria should be selected a priori and described fully, and the process for generating the overall quality rating should be described, but this information is not sufficient for the reader to understand how sources of bias may have influenced the overall quality rating. Quality assessment requires transparency at all stages.
- Summary
- Author This interactive quiz augments the module on assessing the quality of individual studies. This quiz was prepared by Meera Viswanathan, Ph.D., a member of the Research Triangle Institute – University of North Carolina Evidence-based Practice Center and is based on an update of chapter 6 in version 1.0 of the Methods Guide for Comparative Effectiveness Reviews (update available at: http://www.effectivehealthcare.ahrq.gov/ehc/products/60/294/2009_0805_principles1.pdf ).