NR569 STUDY GUIDE 2026
COMPREHENSIVE ANSWER DIGEST
◉What is evidence-based practice in healthcare? Answer: The
conscientious, judicious, and reasonable use of modern evidence in
making decisions about an individual's care.
◉What does a PICOT question stand for in clinical research?
Answer: Patient, Intervention, Comparison, Outcome, and Time.
◉What does sensitivity refer to in medical testing? Answer:
Sensitivity refers to a test's ability to correctly designate an
individual with a disease as positive.
◉What does specificity refer to in medical testing? Answer:
Specificity refers to a test's ability to correctly identify patients who
do not have the disease.
◉What is a positive likelihood ratio in clinical practice? Answer: It is
the likelihood that a patient with the disease tests positive compared
to the likelihood that a patient without the disease tests positive.
, ◉What is a negative likelihood ratio in clinical practice? Answer: It is
the likelihood that a patient with the disease tests negative
compared to the likelihood that a patient without the disease tests
negative.
◉What are the categories of radiographic densities in diagnostic
imaging? Answer: Air (blackest), Fat (darkest grey), Soft
tissues/fluid (light grey), Minerals (lightest grey), Metal (white, most
dense).
◉What does the USPSTF Grade A recommendation indicate?
Answer: It recommends a service with high certainty that the net
benefits are substantial; the service should be offered or provided.
◉What does the USPSTF Grade B recommendation indicate?
Answer: It recommends a service with high certainty that the net
benefits are moderate; the service should be offered or provided.
◉What does the USPSTF Grade C recommendation indicate?
Answer: It recommends selectively offering or providing a service
based on professional judgment and patient preference; the net
benefit is small.
◉What does the USPSTF Grade D recommendation indicate?
Answer: It recommends against a service, indicating moderate or
high certainty that the service has no net benefit.
COMPREHENSIVE ANSWER DIGEST
◉What is evidence-based practice in healthcare? Answer: The
conscientious, judicious, and reasonable use of modern evidence in
making decisions about an individual's care.
◉What does a PICOT question stand for in clinical research?
Answer: Patient, Intervention, Comparison, Outcome, and Time.
◉What does sensitivity refer to in medical testing? Answer:
Sensitivity refers to a test's ability to correctly designate an
individual with a disease as positive.
◉What does specificity refer to in medical testing? Answer:
Specificity refers to a test's ability to correctly identify patients who
do not have the disease.
◉What is a positive likelihood ratio in clinical practice? Answer: It is
the likelihood that a patient with the disease tests positive compared
to the likelihood that a patient without the disease tests positive.
, ◉What is a negative likelihood ratio in clinical practice? Answer: It is
the likelihood that a patient with the disease tests negative
compared to the likelihood that a patient without the disease tests
negative.
◉What are the categories of radiographic densities in diagnostic
imaging? Answer: Air (blackest), Fat (darkest grey), Soft
tissues/fluid (light grey), Minerals (lightest grey), Metal (white, most
dense).
◉What does the USPSTF Grade A recommendation indicate?
Answer: It recommends a service with high certainty that the net
benefits are substantial; the service should be offered or provided.
◉What does the USPSTF Grade B recommendation indicate?
Answer: It recommends a service with high certainty that the net
benefits are moderate; the service should be offered or provided.
◉What does the USPSTF Grade C recommendation indicate?
Answer: It recommends selectively offering or providing a service
based on professional judgment and patient preference; the net
benefit is small.
◉What does the USPSTF Grade D recommendation indicate?
Answer: It recommends against a service, indicating moderate or
high certainty that the service has no net benefit.
