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Standardized Method for Measuring Collection Efficiency from Wipe-sampling of Trace Explosives
Published on: April 10, 2017
Uso y abuso de las pruebas de cribado
David A Grimes1, Kenneth F Schulz
1Family Health International, PO Box 13950, Research Triangle Park, NC 27709, USA. dgrimes@fhi.org
Lancet (London, England)
|March 19, 2002
Resumen
Las pruebas de detección identifican a las personas con mayor riesgo de enfermedades, pero su efectividad depende de una interpretación cuidadosa. Comprender la validez de las pruebas y la prevalencia de la enfermedad es crucial para obtener resultados precisos y evitar intervenciones innecesarias.
Área de la Ciencia:
- Diagnóstico médico Diagnóstico médico
- Salud Pública La salud pública.
- Epidemiología La epidemiología.
Sus antecedentes:
- Las pruebas de detección son ampliamente utilizadas, pero a menudo malentendidas.
- El diagnóstico precoz a través del cribado tiene beneficios potenciales, pero también inconvenientes.
Objetivo del estudio:
- Aclarar los principios y la interpretación de las pruebas de cribado.
- Para resaltar los factores que influyen en la validez y utilidad de las pruebas de detección.
Principales métodos:
- Discusión de las métricas de validez de las pruebas de detección: sensibilidad, especificidad y valores predictivos.
- Análisis de cómo la prevalencia de la enfermedad afecta el rendimiento de las pruebas.
- Consideración de las pruebas secuenciales y sesgos (tiempo de espera, longitud).
Principales resultados:
- Las métricas de validez de la prueba están inversamente relacionadas para las variables continuas; la colocación del corte es crítica.
- La baja prevalencia de la enfermedad reduce significativamente el valor predictivo positivo de las pruebas de detección.
- Los ensayos controlados aleatorios son esenciales para mitigar los sesgos y evaluar con precisión la efectividad del programa de detección.
Conclusiones:
- La detección puede mejorar los resultados de salud, como sugieren los datos de citología cervical.
- La mala aplicación o mala interpretación de las pruebas de detección puede conducir a efectos adversos, incluida la angustia psicológica y el desperdicio de recursos.
Palabras clave:
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