BTSC Staff Nurse 30July-2025
Community Health Nursing
Easy
Which of the following terms describe new cases of a disease?
Appeared in: BTSC Staff Nurse 30July-2025
Explanation
- Incidence is the specific epidemiological term used to quantify the number of new cases of a disease or health condition that arise in a population during a defined period.
- It measures the rate at which new disease occurs and is a primary indicator of the risk of contracting the disease.
- For example, the number of new flu cases reported in a city during the month of December represents the incidence of flu for that period.
Why Other Options Were Wrong
- Option A: Prevalence refers to the total number of cases (both new and pre-existing) in a population at a specific point in time. It measures the overall burden of the disease, not the rate of new occurrences.
- Option C: Comorbidity describes the co-existence of two or more diseases or conditions in a single patient. It does not measure the frequency of a single disease in a population.
- Option D: Endemicity refers to the constant, baseline level of a disease that is consistently present in a particular geographic area or population. It describes a steady state, not the occurrence of new cases.
Related Visual
Clinical Relevance
- Nursing practice connection: Knowing Epidemiological measures of disease frequency helps nurses interpret findings accurately and avoid errors in routine assessment, medication administration, and patient teaching.
- Nurses use incidence data to identify disease outbreaks, track the spread of infections (like COVID-19 or influenza), and evaluate the effectiveness of public health interventions such as vaccination campaigns.
- Distinguishing between incidence and prevalence is crucial for resource allocation. High incidence may require urgent action to control spread, while high prevalence indicates a need for long-term care and management resources.
- What if? If a new vaccine is introduced, nurses would monitor the 'incidence' of the disease to see if it decreases, which would prove the vaccine's effectiveness. The 'prevalence' would decrease more slowly as existing cases resolve.
How to Approach the Question
- First, identify the core concept in the question stem. The key phrase here is 'new cases'.
- Second, recall the definitions of the basic epidemiological terms provided in the options.
- Third, match the key phrase 'new cases' to its precise definition. Incidence specifically refers to new cases over a period.
- Finally, differentiate this from the other terms. Prevalence includes all cases (new and old), comorbidity is about multiple diseases in one person, and endemicity is about the constant presence of a disease in a location.
Concept Tested & Keywords
- Concept Tested: Epidemiological measures of disease frequency
- Stem keywords: new cases, disease, terms
- Lead-in keywords: describe
- Negative lead-in flag: false
Question ID
QolC2ROfcWFgu1PclSumcC
Reference Book
E6 Parks TextBook of Preventive & Social Medicine part 1 — Subpart A (pp 26-201 of 604) pp. 55-57, 53-55
E6 Robert Boland, Marcia L. Verduin - Kaplan and Sadock's Comprehensive Text of Psychiatry-Wolters Kluwer Health (2024) (pp 1-16525 of 16525) p. 2836-2838
Practise the full BTSC Staff Nurse 30July-2025
Attempt every question from this paper in a timed mock, then review the full solution for each one.
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