Academy Evidence Analysis Manual

How to Use This Manual

The Evidence Analysis Manual has been created by the Academy to help expert panels and evidence analysts understand and carry out the process of evidence analysis.

Evidence analysis is a complex process. This manual breaks the process down into concrete parts. A distinction is made between the general steps of the project, and the more concrete actions within each step.

Table 1 presents the major phases in the Academy's evidence analysis process.

Table 1. Steps of the Academy's Evidence Analysis Project

Steps of the Evidence Analysis Process
Brief Description
Tools
Chapter 1
Step 1 - Formulate Evidence Analysis Question
Specify a question in a defined area of practice; or state a tentative conclusion or recommendation that is being considered. Include the patient type and special needs of the target population involved, the alternatives under consideration, and the outcomes of interest (PICO format).
Appendix 1: Question Formulation Template
Appendix 2: The PICO Chart
Chapter 2
Step 2 - Gather and Classify Evidence
Conduct a systematic search of the literature to find evidence related to the question, gather studies and reports, and classify them by type of evidence. Classes differentiate primary reports of new data according to study design, and distinguish them from secondary reports that include systematic and/or narrative review.
(Classes are: A, B, C, D, M, R, and X.)
Appendix 3: Search Plan & Results Table
Appendix 4: Classes of Evidence Reports
Appendix 5: Algorithm for Classifying Research Design
Appendix 6: Glossary of Research Design Terms
Chapter 3
Step 3 - Critically Appraise Each Article
Review each article for relevance to the question and use the checklist of questions to evaluate the research design and implementation. Abstract key information from the report.
Appendix 7: Evidence Abstract Worksheet Template
Appendix 8:Quality Criteria Checklist: Primary Research
Appendix 9: Quality Criteria Checklist: Primary Research Non-human subjects
Appendix 10: Quality Criteria Checklist: Review Article
Appendix 11: Important Considerations (from checklist) by Study Design
Appendix 12: Tally of Primary Research Ratings
Appendix 13: Tally Sheet Example
Chapte 4
Step 4 - Summarize Evidence
Synthesize the reports into an overview table and summarize the research relevant to the question.
Appendix 14: Overview Table
Appendix15: Overview Table Example
Chapter 5
Step 5 - Write and Grade the Conclusion Statement
Develop a concise conclusion statement (the answer to the question). Assign a grade to indicate the overall strength or weakness of evidence informing the conclusion statement.
(The Academy uses Grades I, II, III, IV, and V for strong, fair, weak, expert opinion only, and no evidence, respectively.)
Appendix16: Conclusion Statement and Grade
Appendix17: Grade Definitions for Strength of Evidence for Conclusion
Appendix 18: Grade Definition Table

Overview of the Manual

The manual is set up in two main parts:

  1. The main text: contains a description of each step along with examples from other evidence analysis projects. These examples will help you see how the process was carried out successfully.
  2. Appendices: contains templates (worksheets, checklists, and other tools) of formsused in an online web-based format.

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ADA Research and Strategic Business Development

ADA Evidence Analysis Manual, May 2011

© 2011 American Dietetic Association



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