Diagnostic Testing

Overview

Imagine a new diagnostic test has been developed to identify a specific disease. You are tasked with evaluating the accuracy of this test using a set of patient data.

Preparation

Review the following results from the new diagnostic test. It was given to 80 people,

• True positives: 32 (people with the disease who tested positive).
• False negatives: 3 (people with the disease who tested negative).
• True negatives: 37 (people without the disease who tested negative).
• False positiv for the diseasees for the disease: 8 (people without the disease who tested positive).

Instructions

Using the data above, complete the following as you evaluate the accuracy of the new diagnostic test:

• Create a data table that accurately displays the results of the diagnostic test.
• Calculate the prevalence of disease, sensitivity, specificity, positive predictive value, and negative predictive value. Show the formulas that you are using for each calculation.
• Define sensitivity, specificity, positive predictive value, and negative predictive value.
  • Remember to cite the source(s) that helped you to create your definitions.
• Explain how the prevalence of the disease impacts the sensitivity, specificity, positive predictive value, and negative predictive value of the diagnostic test.

Additionally, your submission will be assessed on:

• Convey purpose, in an appropriate tone and style, incorporating supporting evidence and adhering to organizational, professional, and scholarly writing standards.

Submission Requirements

• Length of Submission: There is no required length for your submission, but make sure you include all necessary data tables, calculations, and written definitions and explanations as directed in the assignment instructions.
• APA Style: Use current APA style for all in-text citations, as well as the reference page.

Competencies Measured

By successfully completing this assignment, you will demonstrate your proficiency in the following course competencies and rubric criteria:

• Competency 1: Apply epidemiological methods to the breadth of settings and situations in public health practice.
  • Create a data table that displays the results of the diagnostic test.
• Competency 2: Explain the basic processes utilized in epidemiological field studies.
  • Define sensitivity, specificity, positive predictive value, and negative predictive value.
• Competency 3: Calculate epidemiologic measures that have an impact on health outcomes.
  • Calculate the prevalence of disease, sensitivity, specificity, positive predictive value, and negative predictive value. Show the formulas that you are using for each calculation.
  • Explain how the prevalence of the disease impacts the sensitivity, specificity, positive predictive value, and negative predictive value of the diagnostic test.
• Competency 4: Communicate audience-appropriate public health content in a logically structured and concise manner, writing clearly with correct use of grammar, punctuation, spelling, and APA style.
  • Convey purpose, in an appropriate tone and style, incorporating supporting evidence and adhering to organizational, professional, and scholarly writing Diagnostic Testing
    Due: Sun Mar 1, 2026 11:59pm

    Ungraded, 200 Possible Points200 Points Possible
    In Progress

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    Overview

    Imagine a new diagnostic test has been developed to identify a specific disease. You are tasked with evaluating the accuracy of this test using a set of patient data.

    Preparation

    Review the following results from the new diagnostic test. It was given to 80 people,

    • True positives: 32 (people with the disease who tested positive).
    • False negatives: 3 (people with the disease who tested negative).
    • True negatives: 37 (people without the disease who tested negative).
    • False positives: 8 (people without the disease who tested positive).

    Instructions

    Using the data above, complete the following as you evaluate the accuracy of the new diagnostic test:

    • Create a data table that accurately displays the results of the diagnostic test.
    • Calculate the prevalence of disease, sensitivity, specificity, positive predictive value, and negative predictive value. Show the formulas that you are using for each calculation.
    • Define sensitivity, specificity, positive predictive value, and negative predictive value.
      • Remember to cite the source(s) that helped you to create your definitions.
    • Explain how the prevalence of the disease impacts the sensitivity, specificity, positive predictive value, and negative predictive value of the diagnostic test.

    Additionally, your submission will be assessed on:

    • Convey purpose, in an appropriate tone and style, incorporating supporting evidence and adhering to organizational, professional, and scholarly writing standards.

    Submission Requirements

    • Length of Submission: There is no required length for your submission, but make sure you include all necessary data tables, calculations, and written definitions and explanations as directed in the assignment instructions.
    • APA Style: Use current APA style for all in-text citations, as well as the reference page.

    Competencies Measured

    By successfully completing this assignment, you will demonstrate your proficiency in the following course competencies and rubric criteria:

    • Competency 1: Apply epidemiological methods to the breadth of settings and situations in public health practice.
      • Create a data table that displays the results of the diagnostic test.
    • Competency 2: Explain the basic processes utilized in epidemiological field studies.
      • Define sensitivity, specificity, positive predictive value, and negative predictive value.
    • Competency 3: Calculate epidemiologic measures that have an impact on health outcomes.
      • Calculate the prevalence of disease, sensitivity, specificity, positive predictive value, and negative predictive value. Show the formulas that you are using for each calculation.
      • Explain how the prevalence of the disease impacts the sensitivity, specificity, positive predictive value, and negative predictive value of the diagnostic test.
    • Competency 4: Communicate audience-appropriate public health content in a logically structured and concise manner, writing clearly with correct use of grammar, punctuation, spelling, and APA style.
      • Convey purpose, in an appropriate tone and style, incorporating supporting evidence and adhering to organizational, professional, and scholarly writing standards.
    .