1. Disease should have a latent period
2. Condition (disease) should be rare
3. Disease should be amenable to treatment
Which of the above must be satisfied before including a screening test into any programme?
Essential Criteria for Screening Tests
Screening tests are vital tools in public health for identifying diseases early. For a screening test to be suitable for inclusion in a formal program, certain fundamental criteria must be met to ensure its effectiveness and benefit to the population.
Analysis of Screening Test Criteria
The question asks which criteria must be satisfied for including a screening test in a program. Let's analyze each:
- 1. Disease has a latent period: This is a mandatory requirement. Screening is effective only when it can detect the disease during its asymptomatic or preclinical (latent) stage, before symptoms manifest. Early detection during this period allows for timely intervention.
- 2. Condition is rare: While the rarity of a disease in the target population is important for the cost-effectiveness and efficiency of a screening program (reducing the number of false positives relative to true positives), it is not an absolute prerequisite for the test's inclusion. The primary goal is the benefit derived from early detection.
- 3. Disease is amenable to treatment: This criterion is essential. The purpose of screening is to enable early treatment that improves health outcomes. If a disease cannot be treated effectively, or if early treatment does not offer significant advantages over treatment initiated later, then screening for that condition provides little to no benefit.
Conclusion
Therefore, the two criteria that must be satisfied for a screening test to be included in a program are that the disease must have a detectable latent period (1) and the disease must be amenable to effective treatment (3). These ensure the feasibility and utility of the screening effort.
Important Questions from Preventive Medicine
Consider the following statement :
"The people should seek to preserve their traditional eating patterns and life-styles associated with low levels of Coronary Heart Disease (CHD)."
Which level of prevention is implied in this statement?
- Which of the following criteria must be met by a disease before it is to be considered suitable for a screening programme?
1. The natural history of the disease should be adequately understood.
2. No effective treatment should exist for the disease.
3. The disease should not have a recognizable latent or asymptomatic stage.
4. There should be a test that can detect the disease prior to onset of signs and symptoms.
Select the correct answer using the code given below. - Determination of alpha-fetoprotein levels in maternal serum is a useful screening tool for
In primary immune response, how much more antigenic dose is required to induce IgG antibodies as against the induction of IgM antibodies?
- Which among the following is/are the examples of primordial prevention ?
1. Adopting healthy lifestyles from childhood
2. Immunization of infants
3. Screening of cervical cancer
Select the correct answer using the code given below:
