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Counterfactual thinking is a cognitive process wherein individuals mentally reconstruct alternative versions of past events, often beginning with “what if” or “if only.” This reflective mechanism plays a significant role in shaping emotional experiences and guiding future behavior. Though typically triggered by unfavorable or unexpected outcomes, counterfactual thinking can also emerge in mundane, everyday decisions and experiences, revealing its deep entrenchment in...
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Data collection gathers information needed to make accurate judgments about a patient's present condition. During a health history interview, subjective data is collected from the patient, their caregivers, or family members, and objective data is collected through observations and physical assessment. Patients are the primary source of subjective data. Thus information gathered from patients through interviews, observations, and physical examination is primary data. Secondary sources of...
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Causality or causation is a fundamental concept in epidemiology, vital for understanding the relationships between various factors and health outcomes. Despite its importance, there's no single, universally accepted definition of causality within the discipline. Drawing from a systematic review, causality in epidemiology encompasses several definitions, including production, necessary and sufficient, sufficient-component, counterfactual, and probabilistic models. Each has its strengths and...
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Generación de Líneas de Tiempo de Pacientes Contrafactuales a partir de Datos del Mundo Real

Yu Akagi1, Tomohisa Seki2, Toru Takiguchi2

  • 1Department of Biomedical Informatics, Graduate School of Medicine, The University of Tokyo, Japan.

AMIA ... Annual Symposium proceedings. AMIA Symposium
|February 23, 2026
PubMed
Resumen

Un modelo avanzado de IA genera trayectorias realistas de la salud del paciente para explorar escenarios hipotéticos. Este avance ayuda a la medicina personalizada y a los ensayos in-silico simulando resultados clínicos con alta precisión.

Palabras clave:
medicina personalizadaensayos in-silicosimulación de saludinteligencia artificialdatos del mundo real

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Área de la Ciencia:

  • Inteligencia Artificial en Medicina
  • Biología Computacional
  • Informática de la Salud

Sus antecedentes:

  • La simulación contrafactual es crucial para la medicina personalizada y los ensayos in-silico.
  • Las limitaciones metodológicas actuales dificultan la simulación contrafactual eficaz.

Objetivo del estudio:

  • Desarrollar y validar un modelo generativo autorregresivo para simulaciones contrafactuales clínicamente plausibles.
  • Evaluar la capacidad del modelo para reproducir patrones clínicos conocidos.

Principales métodos:

  • Se entrenó un modelo generativo autorregresivo con un gran conjunto de datos (más de 300 000 pacientes, 400 millones de entradas de línea de tiempo).
  • Se aplicó el modelo a pacientes con COVID-19, simulando resultados al alterar la edad, la proteína C reactiva (PCR) y la creatinina sérica.
  • Se validaron las trayectorias contrafactuales con patrones clínicos conocidos.

Principales resultados:

  • El modelo generó trayectorias de pacientes contrafactuales clínicamente plausibles.
  • Las simulaciones mostraron un aumento de la mortalidad con la edad avanzada, la elevación de la PCR y la elevación de la creatinina sérica.
  • Se predijeron cambios en las prescripciones de Remdesivir en función de la PCR y la función renal.

Conclusiones:

  • Los modelos generativos autorregresivos pueden realizar simulaciones clínicas contrafactuales de manera eficaz.
  • El aprendizaje autosupervisado con datos del mundo real proporciona una base para la modelización clínica avanzada.
  • Este enfoque apoya el desarrollo de la medicina personalizada y los ensayos in-silico.