Evaluate the Quality of Evidence:
Not all research uses valid methods. Not all evidence is of the same quality. You will need to determine the quality of the study and how best to interpret the results. Below are some resources to help you evaluate the evidence you find.
First, you will need to identify the study design for the article:
Centre for Evidence-Based Medicine: Understanding Study Design and Weaknesses of Types of Study Designs
Next, use a critical appraisal worksheet to guide you. These worksheets have questions for particular study designs to help you evaluate the quality of the study. The following sites provide critical appraisal worksheets. Simply select the type of worksheet that fits the study design for the article you are reading and use the questions on the worksheet to help you think through the study:
Centre for Evidence-Based Medicine: Critical Appraisal Tools
Critical Appraisal Skills Programme (CASP) Worksheets
Learn more about Evidence-Based Public Health and how you can used evidence to help in make decisions in your future career with this tutorial: Evidence-Based Public Health Tutorial