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Updated: Feb 15, 2026

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Métricas de valor predictivo positivo para pruebas de detección multicaner

Paul F Pinsky1, Elyse M LeeVan1, Christos Patriotis1

  • 1Division of Cancer Prevention, National Cancer Institute, NIH, Bethesda, MD, USA.

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|February 13, 2026
PubMed
Resumen
Este resumen es generado por máquina.

Las pruebas de detección multicaner (MCD) requieren definiciones flexibles de valor predictivo positivo (PPV). El contexto clínico determina qué métrica de PPV es más útil para evaluar el rendimiento de las pruebas MCD.

Palabras clave:
Cáncerorigen de la señal del cáncerpruebas de detección multicanervalor predictivo positivocribado

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Área de la Ciencia:

  • Oncología
  • Diagnóstico Médico
  • Bioestadística

Sus antecedentes:

  • Las pruebas de detección multicaner (MCD) criban múltiples tipos de cáncer, a menudo proporcionando un origen de señal de cáncer (CSO) predicho.
  • El valor predictivo positivo (PPV) es una métrica estándar para el cribado de un solo cáncer, pero requiere adaptación para las pruebas MCD.

Objetivo del estudio:

  • Definir y evaluar varias métricas de PPV para pruebas MCD.
  • Crear una prueba MCD prototípica para evaluar las propiedades de PPV.
  • Analizar el impacto de la sensibilidad del sitio no dirigido en el PPV.

Principales métodos:

  • Se definieron métricas de PPV que incluyen PPVALL, PPVT y PPVCSO basadas en diferentes poblaciones de numerador/denominador.
  • Se utilizaron datos de estudios de casos y controles y tasas de incidencia poblacional para modelar el rendimiento de las pruebas MCD (sensibilidad, especificidad, precisión del CSO).
  • Se calcularon los PPV para una prueba MCD prototípica en un rango de sensibilidades para sitios de cáncer no dirigidos.

Principales resultados:

  • La PPVALL aumentó, mientras que la PPVT disminuyó con mayor sensibilidad para sitios de cáncer no dirigidos.
  • Los PPV específicos del sitio dependieron más de la precisión del CSO que de la prevalencia del sitio del cáncer.
  • La elección de la definición de PPV influye significativamente en la interpretación del rendimiento de las pruebas MCD.

Conclusiones:

  • Múltiples definiciones de PPV son aplicables a las pruebas MCD, cada una con implicaciones únicas.
  • La utilidad clínica de los diferentes PPV depende del escenario clínico específico y del uso previsto.
  • La comunicación clara entre los desarrolladores de pruebas MCD y los médicos es esencial para seleccionar y reportar métricas de PPV apropiadas.