Causation of Non-Communicable Diseases (NCDs) is based on the following model :

IGNOU PB. Bsc. Nsg. Entrance-2025

Community Health Nursing

Easy

Appeared in: IGNOU PB. Bsc. Nsg. Entrance-2025

Explanation

The Web of Causation model is specifically designed to explain the etiology of chronic, non-communicable diseases (NCDs).
It illustrates that NCDs are not caused by a single agent but result from a complex interplay of multiple interconnected factors, such as genetics, lifestyle, behavior, and environmental influences.
This model is ideal for diseases like heart disease, diabetes, or cancer, where numerous risk factors contribute to the disease's development over time.
Unlike simpler models, it helps visualize the intricate pathways and relationships between various direct and indirect causes.

Option A: The Epidemiological Triad (Agent, Host, Environment) is the classic model for infectious diseases, where a specific causative agent is a necessary part of the disease process. NCDs do not have a single 'agent' in this sense.
Option B: The Ecological Model is a very broad concept focusing on the general maladjustment between humans and their environment. It is less specific than the Web of Causation for mapping the detailed, multifactorial pathways of a specific chronic disease.
Option D: The Natural History of Disease describes the timeline or progression of a disease within an individual, from the pre-pathogenesis phase to the final outcome. It explains the course of the disease, not the model of its causation.

Clinical Relevance

Nursing practice connection: This is primarily an exam-oriented knowledge point with limited direct bedside application, so retain Epidemiological models of disease causation as background academic context rather than a clinical decision trigger.
Understanding the Web of Causation is crucial for nurses in health promotion and disease prevention. It allows them to identify and address multiple risk factors during patient counseling for NCDs.
This model forms the basis for developing comprehensive community health programs that target lifestyle modifications, environmental improvements, and behavioral changes to reduce the burden of chronic diseases.
Nurses can use this framework to educate patients and families, explaining that managing an NCD requires a multi-pronged approach rather than a single 'cure'.

How to Approach the Question

First, identify the key concepts in the question stem: 'Causation' and 'Non-Communicable Diseases (NCDs)'.
Recall the different epidemiological models used to explain disease causation.
Differentiate the models based on their primary application. The Epidemiological Triad is the classic model for infectious diseases, which have a single, identifiable agent.
Recognize that NCDs are, by definition, multifactorial, meaning they arise from a combination of many different factors (genetic, lifestyle, environmental).
Evaluate the options to see which model best represents this concept of multiple, interconnected causes.
Conclude that the 'Web of Causation' is the model that specifically illustrates the complex, multifactorial etiology of chronic, non-communicable diseases.

Concept Tested & Keywords

Q-AuWCPKGu-NfZz0z6CMxq

E6 Parks TextBook of Preventive & Social Medicine part 1 — Subpart A (pp 26-201 of 604) p. 26-28

E6 Comprehensive Textbook of Community Health NursingShyamala D part 1 (pp 26-389 of 389) p. 359-361