Critically Assessed Study Article FORM

Posted on | by Linus

For this assignment, you will be assigned an article from the peer-reviewed literature that describes an epidemiological study. You will use that article to complete a Critically Assessed Study Article FORM, in which you will provide a summary of the study by explaining the following:
Study purpose (This should be a full sentence. Remember, anytime you use the authors’ words, you must use quotation marks.)
Study design (What study design that is the focus of this exercise??)
Describe the source of the data and the study sample
Primary measure (Sometimes there will be more than 1 primary measure. However, for the purposes of this assignment, choose just the one that you believe is most important and explain why you made that choice. Remember that for our purposes, a measure is the construct (such as glycemic control, or depression, or tuberculosis) that we are measuring, NOT the instrument (such as a PDQ-9) or lab test (such as the HbA1C test) used to measure it.)
Statistical Test used for the primary measure (It should be Odds Ratio). (If it is something else, then you need to contact your instructor.)
Complete the 2×2 table using only the data from the study for the primary measure you were assigned. You will insert the appropriate numbers into the 2×2 table that was used in the study to arrive at the crude (unadjusted) OR reported. (The 2×2 table can be found in the 9th chapter of the textbook, page 254.)
Calculation of the crude (unadjusted) OR. You will put the numbers from the 2×2 table you constructed into the OR formula to show how the resulting OR was derived. (This formula can be found in the 9th chapter of the textbook on page 253.) All of the articles that were chosen for this assignment were chosen because they do report the crude (unadjusted) OR for your assigned variables somewhere in the article so you are able to check your table and calculations to ensure that you have come up with the correct number.
Interpretation of the measure of association for this study. You will explain how the above measure of association is interpreted for this study. The textbook helps you understand how to interpret the OR results.
Discussion of the advantages of using case-control designs. (You can get this from your book.)
Discussion of the limitations of using case-control designs. (You can get this from your book.)
Discussion of bias (information and selection biases) and confounding for this particular study. (See example provided.)
Description of any methods used in the study for minimizing bias and confounding, or methods that could have been used, but weren’t. (See example provided.)
There is an example article and completed form available to you in the Case Study module. You must examine that as a model for the one you will complete for your assigned article. Using this model is the best way for you to understand what is expected of your for this assignment.
IMPORTANT NOTE
The DUE date for this assignment is Sunday, March 10th. However, if you want to spend your Spring Break working on it, I will allow you to submit it up to Sunday, March 17th, without penalty. After March 17th, it will NOT be accepted!
Epidemiology Study Assessment Rubric
Epidemiology Study Assessment Rubric
CriteriaRatingsPts
Followed Instructions (those given here, elsewhere in the course, and via Canvas announcements and emails), Used Correct Grammar and Terminologyview longer description
/ 15 pts
Form Heading Correct
view longer description
/ 5 pts
Purpose of Study
view longer description
/ 5 pts
Study Design
view longer description
/ 10 pts
Study Sample
view longer description
/ 10 pts
Primary Measures
view longer description
/ 10 pts
Statistical Test(s) Used
view longer description
/ 10 pts
2×2 Table
view longer description
/ 5 pts
Calculation
view longer description
/ 5 pts
Interpretation
view longer description
/ 5 pts
Bias
view longer description
/ 10 pts
Strengths & Limitations of Design
view longer description
/ 10 pts
Total Points: 0

Struggling with where to start this assignment? Follow this guide to tackle your assignment easily!

Step-by-Step Guide to Completing the Critically Assessed Study Article Form

Step 1: Read and Understand the Assigned Article

  • Carefully read the article provided to you.
  • Highlight key details, especially about the purpose, design, sample, and measures used in the study.

Step 2: Complete Each Section of the Form

  1. Form Heading:
    • Ensure the heading is completed with the required details (e.g., your name, date, course, and article title).
  2. Purpose of the Study:
    • Write the study’s purpose in a full sentence. Use the authors’ exact words if needed but include quotation marks and citations to avoid plagiarism.
    • Example: “The purpose of this study is to examine the relationship between X and Y in Z population.”
  3. Study Design:
    • Identify the type of study conducted (e.g., case-control, cohort, cross-sectional).
    • Briefly explain why this design is relevant to the research question.
  4. Study Sample and Data Source:
    • Describe the population studied, including sample size, demographics, and how the data was collected.
  5. Primary Measure:
    • Identify the primary measure (e.g., depression, tuberculosis).
    • Explain why you chose this measure if multiple are mentioned. Avoid focusing on the instrument used for measurement.
  6. Statistical Test for the Primary Measure:
    • Confirm the statistical test used is Odds Ratio (OR). If not, contact your instructor immediately.

Step 3: Construct the 2×2 Table

  1. Locate the necessary data in the article to construct a 2×2 table.
    • Label the table as follows:
    Outcome Present (Cases) Outcome Absent (Controls)
    Exposure Present
    Exposure Absent
  2. Fill in the numbers from the study for each category.

Step 4: Calculate the Crude Odds Ratio (OR)

  1. Use the formula provided on page 253 of the textbook:
    • OR = (A x D) / (B x C), where:
      • A = Cases with exposure.
      • B = Controls with exposure.
      • C = Cases without exposure.
      • D = Controls without exposure.
  2. Perform the calculation and verify it matches the crude OR reported in the article.

Step 5: Interpretation of the Odds Ratio

  • Explain what the OR means in the context of the study.
  • Example: “An OR of 3.5 indicates that individuals exposed to X are 3.5 times more likely to develop Y compared to those not exposed.”

Step 6: Discuss Study Design Strengths and Limitations

  1. Advantages:
    • Reference textbook examples, such as efficiency for rare diseases or quicker data collection.
  2. Limitations:
    • Include issues like recall bias, selection bias, and inability to establish causation.

Step 7: Discuss Bias and Confounding

  • Identify potential biases (e.g., selection or information bias) and confounding factors in the study.
  • Discuss methods used to minimize bias, such as matching or statistical adjustments. If no methods were used, propose possible solutions.

Step 8: Proofread and Format in APA Style

  • Ensure proper grammar and terminology.
  • Use APA format for in-text citations and references.

Final Tips

  • Review the example form and rubric provided in the course.
  • Double-check your calculations and interpretations against the article.
  • Submit before the March 10th deadline, or use the extended time until March 17th if needed.

 

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