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Related Concept Videos

Classification of Illness01:17

Classification of Illness

The meaning of illness is individualized to each person who experiences an alteration in health. In contrast, disease is a medical term indicating a pathological change in the structure and function of the body or mind. It is a condition that has specific symptoms and boundaries.
An illness is a response to a disease in which the person's level of functioning is changed compared with a previous level. The general classification of illness includes acute and chronic.
Acute illness is severe and...
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Models of Health Promotion and Illness Prevention II

The person's health status fluctuates continually, varying from being in good health to becoming ill and returning to being healthy. To understand the concept of illness prevention, there are two models. First, the health-illness continuum model is a graphic representation of an individual's wellness. It states that a person is considered healthy in the absence of physical disease and the presence of good emotional health.
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Factors Affecting Illness01:18

Factors Affecting Illness

When a person's physical, emotional, intellectual, social development or spiritual functioning is compromised, this deviation from a healthy normal state is called illness. Illness creates stress that in turn harms individuals. Irritation, anger, denial, hopelessness, and fear are behavioral and emotional changes an individual experiences in the phases of illness. A variety of factors influence a person's health and well-being.
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Stages of Infection01:26

Stages of Infection

Stages of infection describe what happens to a susceptible host once a pathogen invades the human body. The stages of infection are incubation, prodromal, illness, stage of decline, and convalescence. The incubation stage is the period from exposure to a pathogen until symptoms start. The infected person is unaware of impending illness as the pathogens grow and multiply within the body. The duration may vary depending on the type of infection. The incubation period of measles averages ten to...
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The Availability Heuristic

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Related Experiment Video

Updated: May 16, 2026

A Mouse Model for the Transition of Streptococcus pneumoniae from Colonizer to Pathogen upon Viral Co-Infection Recapitulates Age-Exacerbated Illness
12:21

A Mouse Model for the Transition of Streptococcus pneumoniae from Colonizer to Pathogen upon Viral Co-Infection Recapitulates Age-Exacerbated Illness

Published on: September 28, 2022

Would you rather be ill now, or later?

Arthur E Attema1, Matthijs M Versteegh

  • 1Health Economics, Erasmus University Rotterdam, The Netherlands.

Health Economics
|December 12, 2012
PubMed
Summary
This summary is machine-generated.

New time tradeoff (TTO) methods, lead time TTO and lag time TTO, address classic TTO issues. Individuals prefer delayed illness, showing higher discount rates for longer health state durations.

Keywords:
TTOdiscountinglag time TTOlead time TTOtime preference

Related Experiment Videos

Last Updated: May 16, 2026

A Mouse Model for the Transition of Streptococcus pneumoniae from Colonizer to Pathogen upon Viral Co-Infection Recapitulates Age-Exacerbated Illness
12:21

A Mouse Model for the Transition of Streptococcus pneumoniae from Colonizer to Pathogen upon Viral Co-Infection Recapitulates Age-Exacerbated Illness

Published on: September 28, 2022

Area of Science:

  • Health Economics
  • Decision Analysis
  • Biostatistics

Background:

  • The time tradeoff (TTO) method is crucial for calculating quality-adjusted life years (QALYs), impacting medical intervention benefit assessments.
  • Classic TTO faces methodological challenges, leading to the development of 'lead time' TTO and 'lag time' TTO.

Purpose of the Study:

  • To leverage the temporal properties of lead and lag time TTO to estimate implied discounting parameters.
  • To analyze how the timing of health states influences individual preferences and discount rates.

Main Methods:

  • Utilized data from a prior study that implemented lead and lag time TTO.
  • Estimated implied discounting parameters based on individuals' choices regarding the timing of health states.

Main Results:

  • Demonstrated that individuals exhibit a preference for experiencing ill-health at a later time rather than immediately.
  • Found that discount rates increase with longer durations of health states, indicating a greater preference for avoiding prolonged periods of illness.

Conclusions:

  • Lead and lag time TTO methods offer valuable insights into temporal preferences in health valuation.
  • The findings have implications for economic evaluations of healthcare interventions, particularly concerning the timing of benefits and risks.