The number of all current cases of a disease at one point of time is called?

Appeared in: AIIMS Patna NO - 2020

Explanation

Point prevalence refers to the total number of existing cases (both old and new) of a specific disease in a population at a single point in time.
It provides a 'snapshot' of the disease burden at a particular moment, which is useful for health service planning.
The question's phrasing 'all current cases' and 'at one point of time' directly matches the definition of point prevalence.

Why Other Options Were Wrong

Option A: Period prevalence measures all cases (new and pre-existing) that were present at any time during a specified period (e.g., a month or a year), not at a single point in time.
Option B: 'Point incidence' is not a standard or recognized term in epidemiology. Incidence always refers to new cases over a period of time.
Option D: 'Time prevalence' is not a standard epidemiological term. The correct terms are point prevalence and period prevalence.

Related Visual

A timeline diagram illustrating the difference between point prevalence, period prevalence, and incidence. It should show a single snapshot in time for point prevalence, a wi...

Clinical Relevance

Nursing practice connection: Knowing Definition of Epidemiological Measures (Prevalence) helps nurses interpret findings accurately and avoid errors in routine assessment, medication administration, and patient teaching.
Nurses and public health officials use prevalence data to understand the health status of a community, which helps in planning for resource allocation (e.g., hospital beds, specific medications) and implementing targeted health education programs.
A high point prevalence of a chronic condition like diabetes in a community signals a need for more diabetes management clinics, patient education on diet and exercise, and regular screening programs.
What if? If the question asked for the number of new cases of a disease over a year, the correct answer would be Incidence Rate, which measures the risk of developing the disease in a population.

How to Approach the Question

First, identify the keywords in the question stem: 'all current cases' and 'at one point of time'.
Recognize that 'all current cases' refers to a measure of prevalence (the total burden of a disease), not incidence (new cases).
Note the time frame specified: 'at one point of time'. This is the key differentiator, indicating a snapshot.
Evaluate the options. 'Point prevalence' directly corresponds to measuring cases at a single point. 'Period prevalence' refers to a duration. 'Incidence' refers to new cases. 'Point incidence' and 'Time prevalence' are not standard terms.

Concept Tested & Keywords

Concept Tested: Definition of Epidemiological Measures (Prevalence)
Stem keywords: current cases, disease, one point of time
Lead-in keywords: is called
Negative lead-in flag: false

Question ID

QhKihvDUEQBCXeymCcqvMC

Reference Book

E6 Parks TextBook of Preventive & Social Medicine part 1 — Subpart A (pp 26-201 of 604) p. 55-57

E6 Robert Boland, Marcia L. Verduin - Kaplan and Sadock's Comprehensive Text of Psychiatry-Wolters Kluwer Health (2024) (pp 1-16525 of 16525) p. 2834-2836

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