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Q-1 Period Between possible time of detection and possible time of diagnosis is:
(A)Lead Time (B)Screening Time (C)Generation Time (D)Serial Interval
Check Answer
Q-1: Lead Time
Lead time is the period between the time a disease first begins and when a screening test can detect it.
Q-2 Screening test has following excepts:
(A)Done On Apparently Healthy Persons (B)It is Less Accurate (C)Test Results are Arbitray and Final (D)Used As Basis of Treatment
Check Answer
Done On Apparently Healthy Persons
Screening tests are performed on individuals who seem healthy but may have an increased risk of developing a particular disease.
Q-3 Screening of disease is whichi type of prevention?
(A)Primordial (B)Primary (C)Secondary (D)Tertiary
Check Answer
Secondary
Secondary prevention aims to detect a disease early, before symptoms appear, to facilitate treatment and improve outcomes. Screening falls under this category.
Q-4 Which among following is not the aim of screening
(A)Reduce Mortality (B)Reduce the Incidence (C)Reduce The Severity (D)Treating The Disease
Check Answer
Treating The Disease
Screening identifies individuals who might have a disease, but it doesn’t provide treatment. Treatment decisions come after confirmatory tests.
Q-5 Blood screening is not done for:
(A)HIV (B)HBV (C)EBV (D)HCV
Check Answer
EBV (Epstein-Barr Virus)
Blood tests typically screen for HIV, HBV (Hepatitis B virus), and HCV (Hepatitis C virus). EBV screening isn’t routinely done.
Q-6 Active search for disease healthy individual is called as
Validity refers to whether a test accurately measures what it’s intended to. Reliability focuses on how consistently the test produces the same results.
Q-8 Positive predictive value is a function of sensitivity, specificity and….
Positive predictive value (PPV) considers the probability of having the disease given a positive test result. It depends on both test characteristics (sensitivity & specificity) and disease prevalence.
Q-9 If the pervalence of a disease in a population increases, the predictive value of a positive tests:
With a higher disease prevalence, there’s a greater chance of a positive test being a false positive. So, the PPV decreases.
Q-10 The diagnostic power of a test is reflected by:
(A)Sensitivity (B)Specificity (C)Predictive Value (D)Population Attributable Risk
Check Answer
Sensitivity and Specificity
Sensitivity reflects the test’s ability to identify true positives (correctly identifying those with the disease). Specificity indicates its ability to identify true negatives (correctly identifying those without the disease).
Q-11 For the calculation of positive predictive value of a screening test, the denominator is comprised of:
(A)TP+FN (B)FP+TN (C)TP+FP (D)TP+TN
Check Answer
TP+FP
The denominator for PPV calculation includes all those who tested positive, regardless of their actual disease status (true positives + false positives).
Q-12 Validity includes:
(A)Sensitivity and Specificity (B)Precision (C)Acceptability (D)None
Check Answer
(A) Sensitivity and Specificity
Q-13 Most important factor for a test to be a good screening test is:
(A)Specificity (B)Sensitivity (C)Reliablity (D)Predictive value
Check Answer
Specificity
A good screening test has high specificity to minimize false positives, reducing unnecessary anxiety and further testing for healthy individuals.
Q-14 Specificity of a screening test refers to its ability to detect
