PHC 6001 Screening in Public Health
Practice Questions Fully Solved.
What is screening? - Answer -allows for early detection of disease
-followed by clinical diagnosis and treatment
-useful if early detection will improve treatment outcomes
primary type of prevention - Answer -intervention with healthy person before pathological
onset of disease
-goal of preventing them from ever getting disease
secondary type of prevention - Answer -intervention in a person who has a disease, but is
asymptomatic (preclinical). screening programs, glucose testing.
tertiary type of prevention - Answer -reduces the impact of disease in someone who is
clinically ill, rehab and quick treatment. relies on available treatment
which diseases can be screened? - Answer - more effective if it is:
cost effective, doesn't hurt too much and isn't too risky, acceptable to the population, valid and
reliable
example: colonoscopy
reliability - Answer you can administer the test moer than once and it will give the same
result for an individual
False Positives - Answer -when a test indicates someone has a disease but they actually
don't.
-unnecessary treatment. may be a stigma that could last beyond the corrected test result.
false negatives - Answer when the test indicates someone does not have the disease but
they actually do
- failure to treat the disease. opt to not change lifestyle and not make plans they wouldve made
if they knew they had the disease
-potential spread of disease
What is sensitivity? - Answer the probability that the test will correctly identify a person with
a disease as being positive
Practice Questions Fully Solved.
What is screening? - Answer -allows for early detection of disease
-followed by clinical diagnosis and treatment
-useful if early detection will improve treatment outcomes
primary type of prevention - Answer -intervention with healthy person before pathological
onset of disease
-goal of preventing them from ever getting disease
secondary type of prevention - Answer -intervention in a person who has a disease, but is
asymptomatic (preclinical). screening programs, glucose testing.
tertiary type of prevention - Answer -reduces the impact of disease in someone who is
clinically ill, rehab and quick treatment. relies on available treatment
which diseases can be screened? - Answer - more effective if it is:
cost effective, doesn't hurt too much and isn't too risky, acceptable to the population, valid and
reliable
example: colonoscopy
reliability - Answer you can administer the test moer than once and it will give the same
result for an individual
False Positives - Answer -when a test indicates someone has a disease but they actually
don't.
-unnecessary treatment. may be a stigma that could last beyond the corrected test result.
false negatives - Answer when the test indicates someone does not have the disease but
they actually do
- failure to treat the disease. opt to not change lifestyle and not make plans they wouldve made
if they knew they had the disease
-potential spread of disease
What is sensitivity? - Answer the probability that the test will correctly identify a person with
a disease as being positive
