AIIMS Raipur lecturer 2021
Community Health Nursing
Easy
The measurement of morbidity in which the number of new cases occurring in a defined population during a specified period of time is known as:
Appeared in: AIIMS Raipur lecturer 2021
Explanation
- Incidence is the correct term as it specifically measures the occurrence of new cases of a disease within a population over a defined time period.
- This measure is a rate, reflecting the speed at which new cases are appearing, and is a direct indicator of the risk of contracting the disease.
- The formula is (Number of new cases / Population at risk) × multiplier, and it is crucial for tracking infectious disease outbreaks and evaluating prevention programs.
- Unlike prevalence, incidence is not influenced by the duration of the illness, making it ideal for studying acute conditions and the causes of disease.
Why Other Options Were Wrong
- Option B: Prevalence counts all existing cases (both new and old), not just new ones. It measures the overall burden of a disease in a population at a specific point or period in time.
- Option C: Sensitivity is a measure of a diagnostic test's performance, not a measure of disease frequency in a population. It quantifies how well a test identifies true positives.
- Option D: Specificity, like sensitivity, measures a diagnostic test's performance. It quantifies how well a test identifies true negatives (people without the disease).
Related Visual
Clinical Relevance
- Nursing practice connection: This is primarily an exam-oriented knowledge point with limited direct bedside application, so retain Epidemiological Measures of Morbidity as background academic context rather than a clinical decision trigger.
- Understanding incidence is critical for community health nurses to track infectious disease outbreaks (e.g., COVID-19, influenza) and implement timely control measures.
- Nurses use incidence data to identify high-risk groups, plan health education programs, and advocate for resources for disease prevention.
- A rising incidence rate for a hospital-acquired infection would trigger a nurse-led investigation into infection control practices and protocols.
How to Approach the Question
- First, carefully read the question and identify the key terms in the definition provided: 'new cases', 'defined population', and 'specified period of time'.
- Next, review the options provided: Incidence, Prevalence, Sensitivity, and Specificity.
- Recall the precise definition of each term. Incidence relates to new cases, while prevalence relates to all (new + old) cases. Sensitivity and specificity relate to the accuracy of tests.
- Match the keywords from the question stem to the correct definition. The term 'new cases' is the most direct clue pointing to Incidence.
- Eliminate the other options by confirming they do not match the definition. Prevalence includes old cases, and sensitivity/specificity are test metrics, not population disease frequency measures.
Concept Tested & Keywords
- Concept Tested: Epidemiological Measures of Morbidity
- Stem keywords: measurement of morbidity, new cases, defined population, specified period of time
- Lead-in keywords: is known as
- Negative lead-in flag: false
Question ID
QKhHdm1A0QQDkpkxL70R3d
Reference Book
E6 Parks TextBook of Preventive & Social Medicine part 1 — Subpart A (pp 26-201 of 604) p. 53-55
E6 NursingResearch Suresh Sharma 5e Part 2 p. 198-200
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