Question
Which of the following are the characteristic features of screening tests?
1. Done on healthy people
2. Done on unhealthy people
3. More accurate
4. Less accurate
5. Less expensive
6. More expensive
7. Not a basis for treatment
8. Used as a base for treatment
Select the correct answer using the code given below:
The correct answer is
1, 4, 5 and 7
Screening Test Features Analysis
Screening tests are used to detect potential diseases or health conditions in people who do not have any symptoms.
Evaluating Each Feature
- 1. Done on healthy people: This is a key characteristic. Screening targets individuals who appear healthy but might be at risk or have an undetected condition.
- 2. Done on unhealthy people: This describes diagnostic tests, which are performed after symptoms appear or a condition is suspected.
- 3. More accurate: Screening tests aim for broad applicability and may prioritize sensitivity (detecting most cases) over specificity (avoiding false positives). They are often less accurate than definitive diagnostic tests.
- 4. Less accurate: Compared to diagnostic tests, screening tests might have a higher rate of false positives or false negatives, making them less precise.
- 5. Less expensive: To be implemented widely across a population, screening tests are generally designed to be cost-effective.
- 6. More expensive: This is usually untrue, as cost is a major factor in the feasibility of large-scale screening programs.
- 7. Not a basis for treatment: A positive screening result indicates a need for further investigation (diagnostic tests) before any treatment decisions are made.
- 8. Used as a base for treatment: Treatment decisions are based on confirmed diagnoses derived from diagnostic tests, not preliminary screening results.
Identifying Correct Combination
Based on the analysis, the characteristic features of screening tests are:
- Done on healthy people (1)
- Less accurate (relative to diagnostic tests) (4)
- Less expensive (5)
- Not a basis for treatment (7)
Therefore, the correct option includes features 1, 4, 5, and 7.
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Important Questions from Disease
- The sequence of events leading to disability and handicap is:
Match List-I with List-II and select the correct answer using the code given below the lists:
List-I (Major Group of Insecticides) List-II (Name of Insecticide) A. Stomach poison 1. Temephos B. Organo-chlorine compound 2. Propoxur C. Organo-phosphorous compound 3. Sodium fluoride D. Carbamates 4. Dieldrin - With reference to mumps, consider the following statements:
1. The average age of incidence of mumps is higher than that of measles and chicken pox.
2. The mumps disease tends to be more severe in adults than in children.
Which of the statements given above is/are correct? - Consider the following features of food poisoning:
'Incubation period less than 24 hours, source of infection is milk products, and symptoms include diarrhoea and vomiting.'
To which of the following does the above description apply?
1. Staphylococcal food poisoning
2. Salmonella food poisoning
3. Botulism
Select the correct answer using the code given below: Match List I with List II and select the correct answer using the codes given below the lists:
List I (Disease) List II (Example) A. Nosocomial 1. Cytomegaloviral infection B. Opportunistic 2. Hepatitis B viral infection C. Iatrogenic 3. Aplastic anemia D. Epornithic 4. Influenza
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