Prospective Study
Prospective Study - Related Videos
06:41
Prospect Theory
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2023
Source: Laboratory of Jonathan Flombaum—Johns Hopkins University What’s the value of a dollar? Currencies store value to facilitate trade. Implied in any economic transaction is the value of a unit of currency. But what is the subjective value of a dollar? For a long time, economists assumed the answer to this question to be, specifically, that a dollar has a value determined by the market and that the subjective value of a dollar is always that, more or less. Beginning in the early 1970s,...
01:24
The Prospect Theory
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2026
Prospect theory, developed by Daniel Kahneman and Amos Tversky, explains how individuals make decisions under risk and uncertainty, particularly in the context of investments. Unlike traditional economic theories that assume investors act rationally to maximize utility, prospect theory suggests that people evaluate potential gains and losses relative to a reference point rather than in absolute terms.Loss Aversion and Its Impact on Decision-MakingA central tenet of prospect theory is loss...
01:24
Prospect Theory: Isolation Effect
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2025
The isolation effect is integral to prospect theory, which describes how individuals make decisions. It highlights a tendency to concentrate on what distinguishes options rather than what they have in common, resulting in a narrow focus that can lead to inconsistent decision-making. Choices are often inconsistent because they are influenced by how the options are presented. This is because changing the description of the options from gains to losses, or vice versa, changes how people perceive...
01:26
Prospect Theory: Certainty of Gains
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2025
Prospect theory describes how individuals assess gains and losses, revealing that they exhibit loss aversion by placing a greater emphasis on potential losses than on equivalent gains. This leads to risk-averse behavior when gains are involved and risk-seeking behavior when faced with losses, as individuals try to avoid certain losses in most cases.For instance, consider Daniel, a small business owner, who is deciding how to allocate his budget. He has two options for a profitable project. The...
04:09
Prospective, Randomized, and Controlled Study of a Human Umbilical Cord Mesenchymal Stem Cell Injection for Treating Diabetic Foot Ulcers
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Cited by 11 •
2023
The present protocol describes a prospective, randomized, controlled clinical study that evaluates a human umbilical cord mesenchymal stem cell injection for the treatment of chronic diabetic foot ulcers.
FAQs
Recording exposures or characteristics before the outcome occurs establishes a clear time sequence between the measured factors and later events. This ordering allows researchers to examine disease development and calculate incidence, risk, and relative risk over follow-up. It strengthens interpretation of associations because the outcome is assessed after baseline information has been collected.
Confounding can distort the observed association between a potential risk factor and an outcome when other measured characteristics also influence the relationship. A Prospective Study therefore requires careful consideration of baseline variables and analysis plans. Managing confounding helps researchers distinguish the association of interest from patterns attributable to differences among participants.
Participants provide information about exposures or characteristics before the later outcome is known, rather than relying entirely on memory after an event has occurred. This timing can reduce recall bias, which may arise when people remember past information differently according to their outcome. More consistent baseline recording improves the quality of association analyses.
Researchers first define the study population and enroll participants before the outcome occurs. They then record baseline exposures or characteristics, establish planned follow-up intervals, and collect outcome data throughout the study. The resulting dataset links initial measurements with later events, providing the structure needed to assess incidence, risk, relative risk, and prognostic associations.
Follow-up data can support estimates of incidence, which describes the occurrence of new events over time, as well as risk and relative risk for comparing outcome patterns across groups. These measures help quantify relationships between baseline exposures or characteristics and later health outcomes, giving researchers evidence to evaluate potential risk factors and prognostic factors.
This design is useful for investigating how disease develops, evaluating whether baseline characteristics have prognostic value, and informing prevention strategies. It can reveal how potential risk factors relate to subsequent health outcomes while preserving the sequence between measurement and event. Researchers must still account for loss to follow-up and confounding when interpreting results.