A public health nurse is educating a newly licensed nurse about sensitivity and specificity using a two-by-two table. Which of the following statements by the newly licensed nurse indicates an understanding of the table related to true positives?
"True positives are represented in the table cell that indicates the person does not have the disease and the test indicates disease."
"True positives are represented in the table cell that indicates the person has the disease and the test indicates the person has the disease."
"True positives are represented in the table cell that indicates the person has the disease and the test does not indicate disease."
"True positives are represented in the table cell that indicates the person does not have the disease and the test does not indicate disease."
The Correct Answer is B
Choice A: "True Positives are Represented in the Table Cell that Indicates the Person Does Not Have the Disease and the Test Indicates Disease."
This statement is incorrect. In a two-by-two table used to evaluate diagnostic tests, the cell representing true positives is where both the test result and the actual disease status are positive. This cell indicates that the test correctly identified individuals who have the disease. The statement here describes a false positive, where the test indicates disease, but the person does not actually have it.
Choice B: "True Positives are Represented in the Table Cell that Indicates the Person Has the Disease and the Test Indicates the Person Has the Disease."
This statement is correct. True positives are indeed represented in the cell where both the test result and the actual disease status are positive. This means the test has correctly identified individuals who have the disease. This cell is crucial for calculating the sensitivity of the test, which measures the proportion of actual positives correctly identified by the test.
Choice C: "True Positives are Represented in the Table Cell that Indicates the Person Has the Disease and the Test Does Not Indicate Disease."
This statement describes a false negative, where the person has the disease, but the test fails to detect it. This cell is used to calculate the test's sensitivity, but it does not represent true positives. False negatives are critical to understand because they indicate cases where the test missed the disease.
Choice D: "True Positives are Represented in the Table Cell that Indicates the Person Does Not Have the Disease and the Test Does Not Indicate Disease."
This statement describes true negatives, where the test correctly identifies individuals who do not have the disease. While true negatives are important for calculating the specificity of the test, they do not represent true positives. Specificity measures the proportion of actual negatives correctly identified by the test.
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Related Questions
Correct Answer is D
Explanation
Choice A Reason:
Evaluation is a core function of epidemiology that involves assessing the effectiveness, efficiency, and impact of health programs and interventions. While attending conferences can provide valuable insights and knowledge that contribute to evaluation efforts, the primary activity described in the scenario is networking and staying current, which aligns more closely with the concept of linkages.
Choice B Reason:
Policy development is another critical function of epidemiology, focusing on creating and advocating for policies that promote public health. Although attending conferences can inform policy development by providing the latest research and best practices, the main activity in the scenario is interacting with colleagues and staying updated, which is more about building connections and collaborations.
Choice C Reason:
Surveillance involves the systematic collection, analysis, and interpretation of health data to monitor and prevent disease outbreaks. While conferences can offer updates on surveillance methods and findings, the nurse's primary engagement in the scenario is networking and professional development, which does not directly involve surveillance activities.
Choice D Reason:
Linkages refer to the connections and collaborations between public health professionals, organizations, and communities. Attending the APHA meeting annually allows the nurse to build and maintain these linkages by interacting with colleagues and staying current in the field. These connections are essential for sharing knowledge, resources, and best practices, ultimately enhancing public health efforts.
Correct Answer is D
Explanation
Choice A: Recommend the Client Obtain a Part-Time Job
Recommending a part-time job might seem like a good way to keep the adolescent busy and help them integrate into their new environment. However, this approach may not directly address the underlying issues of depression and could potentially add more stress. Adolescents dealing with depression need professional mental health support to navigate their feelings and develop coping strategies.
Choice B: Arrange a Visit with a Neurologist
While a neurologist can help with neurological disorders, depression due to a recent move is typically a psychological issue rather than a neurological one. Therefore, arranging a visit with a neurologist is not the most appropriate intervention. The focus should be on providing mental health support through counseling and therapy.
Choice C: Encourage the Client to Engage in Physical Activity Such as Joining a Sports Team
Encouraging physical activity is beneficial for mental health as it can help reduce symptoms of depression and improve overall well-being. However, while physical activity can be a helpful supplementary intervention, it should not be the primary approach. Professional counseling is essential to address the root causes of depression and provide the necessary support.
Choice D: Schedule an Appointment with a School-Based Counselor
This is the correct intervention. A school-based counselor is trained to provide mental health support to students. They can help the adolescent process their feelings, develop coping strategies, and provide a safe space to talk about their experiences. Counseling is a crucial step in addressing depression and helping the student adjust to their new environment.
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