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.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is D
Explanation
Choice A Reason:
The portal of entry refers to the site through which pathogens enter the body. While handwashing can indirectly affect the portal of entry by reducing the number of pathogens on the hands, it primarily targets the mode of transmission. The portal of entry includes areas such as the respiratory tract, gastrointestinal tract, and breaks in the skin.
Choice B Reason:
The susceptible host is an individual who is at risk of infection due to factors such as age, underlying health conditions, or weakened immune systems. Handwashing does not directly alter the susceptibility of the host but rather reduces the likelihood of the host coming into contact with pathogens.
Choice C Reason:
The portal of exit is the site from which pathogens leave the host to infect another individual. Common portals of exit include the respiratory tract, gastrointestinal tract, and open wounds. Handwashing does not directly impact the portal of exit but helps prevent the spread of pathogens from one person to another.
Choice D Reason:
Mode of transmission refers to the way pathogens are transferred from one host to another. Handwashing is a critical intervention that targets this link in the chain of transmission by removing pathogens from the hands, thereby preventing their spread through direct contact or contact with contaminated surfaces. This is why proper handwashing technique is emphasized in infection control practices.
Correct Answer is D
Explanation
Choice A Reason:
Assessing the client's wound is a task that requires clinical judgment and expertise, which falls under the scope of practice of a registered nurse (RN) or licensed practical nurse (LPN). Assistive personnel (AP) are not trained or authorized to perform assessments, as these require a higher level of clinical knowledge and decision-making.
Choice B Reason:
Notifying the case manager of the client's wishes for community resources involves communication and coordination of care, which are responsibilities typically handled by an RN or LPN. This task requires understanding the client's overall care plan and the ability to communicate effectively with other healthcare professionals.
Choice C Reason:
Reviewing the client's medications is a task that involves understanding the medications, their purposes, potential side effects, and interactions. This requires clinical knowledge and judgment, which are beyond the scope of practice for AP. Medication review is typically performed by an RN or LPN.
Choice D Reason:
Assisting the client with bathing and oral care is a task that falls within the scope of practice for AP. These activities are part of the basic care tasks that AP are trained to perform. They involve helping the client with daily living activities, which do not require clinical judgment or decision-making.
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