Case Study Discussion 2 (50 points)
Purpose: To assess ability to appraise statistical evidence and use quantitative reasoning to examine clinical
problems in evidence based practice. (Objectives 1 – 3).
Due date: Post by Wednesday of Week 8. Discuss through SATURDAY of Week 8.
Submit: Discussion Board in Blackboard
This assignment is an opportunity for students to collaborate with classmates and instructors in appraising
statistical evidence. The goal of the assignment is to allow students to demonstrate their ability to use the CER
approach to appraise statistical evidence presented in a journal article.
Before beginning the assignment, students should refresh their recollection of the Cohn et al. (2009) article
(posted in Week 4 in Blackboard). Students will investigate claims made in the Chun et al. (2014) article on
hand hygiene among ICU nurses.
The assignment has four steps.
1. Read the article.
2. Choose one of the following claims (only one).
a. Claim #1 by Chun et al (2014) is: “Hand hygiene education and individual feedback of hand
hygiene frequency and method were effective in increasing hand hygiene frequency and
improving nurses’ methodology scores of hand hygiene” (Chun et al., 2014).
b. Claim #2 by Chun et al (2014) is that the intervention” was proven to decrease MRSA
acquisition rate and MRSA colonization pressure” (Chun et al., 2014).
3. Write a post for the discussion board in the following format (and post it by Wednesday of Week 8). The
post should be 100 to 300 words in length.
a. State the claim
b. List the statistical evidence provided in the article to support the claim
c. Explain why the evidence supports or fails to support the claim and critically appraise the article
and claim using Cohen et al. (2009).
4. Engage in the discussion board to read and comment on classmates’ and instructors’ contributions.
a. Students must engage with the topic; i.e., comments need to present differing perspectives and
b. Students must engage in conversation; i.e., when Student B comments on Student A’s post, then
Student A should respond to Student B’s comment.
c. Students must be collegial and collaborative in their posts and conversations.
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