El número necesario a tratar ( NNT NNT The number needed to treat (NNT) is the number of patients that are needed to treat to prevent 1 additional adverse outcome (e.g., stroke, death). For example, if a drug has an nnt of 10, it means 10 people must be treated with the drug to prevent 1 additional adverse outcome. Number Needed to Treat) es el número de pacientes que se necesitan tratar para prevenir 1 resultado secundario adicional (e.g., accidente cerebrovascular, muerte). Por ejemplo, si un medicamento tiene un NNT NNT The number needed to treat (NNT) is the number of patients that are needed to treat to prevent 1 additional adverse outcome (e.g., stroke, death). For example, if a drug has an nnt of 10, it means 10 people must be treated with the drug to prevent 1 additional adverse outcome. Number Needed to Treat de 10, significa que 10 personas deben recibir tratamiento con el medicamento para prevenir 1 resultado secundario adicional. El NNT NNT The number needed to treat (NNT) is the number of patients that are needed to treat to prevent 1 additional adverse outcome (e.g., stroke, death). For example, if a drug has an nnt of 10, it means 10 people must be treated with the drug to prevent 1 additional adverse outcome. Number Needed to Treat es el inverso de la reducción del riesgo absoluto (RRA), que es igual a la tasa de resultados secundarios que ocurren en EN Erythema nodosum is an immune-mediated panniculitis (inflammation of the subcutaneous fat) caused by a type IV (delayed-type) hypersensitivity reaction. It commonly manifests in young women as tender, erythematous nodules on the shins. Erythema Nodosum el grupo de control menos la cantidad de resultados secundarios en EN Erythema nodosum is an immune-mediated panniculitis (inflammation of the subcutaneous fat) caused by a type IV (delayed-type) hypersensitivity reaction. It commonly manifests in young women as tender, erythematous nodules on the shins. Erythema Nodosum el grupo experimental.
Last updated: Dec 15, 2025
Para comprender el concepto de número necesario a tratar, se recomiendan algunos conocimientos previos sobre estadística descriptiva e inferencial.
El número necesario a tratar ( NNT NNT The number needed to treat (NNT) is the number of patients that are needed to treat to prevent 1 additional adverse outcome (e.g., stroke, death). For example, if a drug has an nnt of 10, it means 10 people must be treated with the drug to prevent 1 additional adverse outcome. Number Needed to Treat); y su análogo, el número necesario para dañar (NND), son simplemente otras medidas del tamaño del efecto, como la d de Cohen, y ayudan a relacionar una diferencia en EN Erythema nodosum is an immune-mediated panniculitis (inflammation of the subcutaneous fat) caused by a type IV (delayed-type) hypersensitivity reaction. It commonly manifests in young women as tender, erythematous nodules on the shins. Erythema Nodosum el tamaño del efecto con la relevancia clínica del mundo real.
El NNT NNT The number needed to treat (NNT) is the number of patients that are needed to treat to prevent 1 additional adverse outcome (e.g., stroke, death). For example, if a drug has an nnt of 10, it means 10 people must be treated with the drug to prevent 1 additional adverse outcome. Number Needed to Treat significa cuántos pacientes necesitarían ser tratados para mejorar el estado de 1 paciente adicional, que de otro modo no habría mejorado sin ese tratamiento en EN Erythema nodosum is an immune-mediated panniculitis (inflammation of the subcutaneous fat) caused by a type IV (delayed-type) hypersensitivity reaction. It commonly manifests in young women as tender, erythematous nodules on the shins. Erythema Nodosum particular.
Todos estos términos representan el valor absoluto de la diferencia entre la proporción (expresada como porcentaje, fracción o incidencia) de pacientes en EN Erythema nodosum is an immune-mediated panniculitis (inflammation of the subcutaneous fat) caused by a type IV (delayed-type) hypersensitivity reaction. It commonly manifests in young women as tender, erythematous nodules on the shins. Erythema Nodosum el grupo control (Pc) que tuvieron el resultado de interés y la proporción de pacientes en EN Erythema nodosum is an immune-mediated panniculitis (inflammation of the subcutaneous fat) caused by a type IV (delayed-type) hypersensitivity reaction. It commonly manifests in young women as tender, erythematous nodules on the shins. Erythema Nodosum el grupo experimental (Pe) con eso el resultado de interés:
$$ {RRA = DRA = ERA = \left | P_{c} – P_{e} \right |} $$El NND es el número adicional de personas que necesitan estar expuestas al AL Amyloidosis riesgo (exposición dañina o tratamiento) para que 1 persona adicional desarrolle la enfermedad en EN Erythema nodosum is an immune-mediated panniculitis (inflammation of the subcutaneous fat) caused by a type IV (delayed-type) hypersensitivity reaction. It commonly manifests in young women as tender, erythematous nodules on the shins. Erythema Nodosum comparación con el grupo no expuesto.
Una tabla de contingencia de 2 x 2 usa un resultado binario y 2 grupos de sujetos para mostrar la base para calcular NNT NNT The number needed to treat (NNT) is the number of patients that are needed to treat to prevent 1 additional adverse outcome (e.g., stroke, death). For example, if a drug has an nnt of 10, it means 10 people must be treated with the drug to prevent 1 additional adverse outcome. Number Needed to Treat y NND. Cada resultado debe expresarse como una proporción, porcentaje o incidencia, y no como el número real de sujetos.
| Resultado | Grupo tratado | Grupo control |
|---|---|---|
| Positivo | a | b |
| Negativo | c | d |
| Total | a + c | b + d |
Si lo siguiente es cierto, la diferencia de proporciones es P tratado – P control.
La diferencia de riesgo absoluto (DRA) es igual a la RRA, que se calcula como el valor absoluto de la diferencia entre P tratado y P control.
$$ {DRA = RRA = \left | P_{tratado} – P_{control} \right |} $$Entonces, el NNT NNT The number needed to treat (NNT) is the number of patients that are needed to treat to prevent 1 additional adverse outcome (e.g., stroke, death). For example, if a drug has an nnt of 10, it means 10 people must be treated with the drug to prevent 1 additional adverse outcome. Number Needed to Treat se puede calcular como:
$$ {NNT = \frac{1}{\left | P_{tratado} – P_{control} \right |}} $$Si el grupo tratado o expuesto tiene un peor resultado que el control, la RRA se llama ERA. En EN Erythema nodosum is an immune-mediated panniculitis (inflammation of the subcutaneous fat) caused by a type IV (delayed-type) hypersensitivity reaction. It commonly manifests in young women as tender, erythematous nodules on the shins. Erythema Nodosum ese caso, el NNT NNT The number needed to treat (NNT) is the number of patients that are needed to treat to prevent 1 additional adverse outcome (e.g., stroke, death). For example, if a drug has an nnt of 10, it means 10 people must be treated with the drug to prevent 1 additional adverse outcome. Number Needed to Treat se llama número necesario para dañar (NND). En EN Erythema nodosum is an immune-mediated panniculitis (inflammation of the subcutaneous fat) caused by a type IV (delayed-type) hypersensitivity reaction. It commonly manifests in young women as tender, erythematous nodules on the shins. Erythema Nodosum ambos casos, el cálculo es el mismo (NND = 1/DRA).
Un ensayo clínico aleatorizado estudió el efecto de la exposición infantil al AL Amyloidosis humo de 2da mano sobre la incidencia de adenocarcinoma broncogénico. El estudio incluyó a 100 sujetos (50 expuestos al AL Amyloidosis humo de 2da mano en EN Erythema nodosum is an immune-mediated panniculitis (inflammation of the subcutaneous fat) caused by a type IV (delayed-type) hypersensitivity reaction. It commonly manifests in young women as tender, erythematous nodules on the shins. Erythema Nodosum la infancia y 50 controles sanos sin exposición en EN Erythema nodosum is an immune-mediated panniculitis (inflammation of the subcutaneous fat) caused by a type IV (delayed-type) hypersensitivity reaction. It commonly manifests in young women as tender, erythematous nodules on the shins. Erythema Nodosum la infancia) e involucró el seguimiento de la incidencia de adenocarcinoma broncogénico a lo largo de la vida. Los LOS Neisseria datos del estudio se muestran en EN Erythema nodosum is an immune-mediated panniculitis (inflammation of the subcutaneous fat) caused by a type IV (delayed-type) hypersensitivity reaction. It commonly manifests in young women as tender, erythematous nodules on the shins. Erythema Nodosum la siguiente tabla:
| Resultado | Grupo Expuesto | Grupo Control |
|---|---|---|
| Adenocarcinoma broncogénico presente | 18 | 7 |
| Adenocarcinoma broncogénico no presente | 32 | 43 |
| Total | 50 | 50 |
¿Qué es el NND?
Respuesta: NND = 1/diferencia de riesgo absoluta (llamada “ERA” cuando se trata de NND). ERA = Pe – Pc = 18/50 – 7/50 = 0,22. NND = 1/0,22 = 4,45 ⇾ 5, lo que significa que 5 personas deben estar expuestas al AL Amyloidosis humo de 2da mano en EN Erythema nodosum is an immune-mediated panniculitis (inflammation of the subcutaneous fat) caused by a type IV (delayed-type) hypersensitivity reaction. It commonly manifests in young women as tender, erythematous nodules on the shins. Erythema Nodosum la infancia para que 1 persona adicional desarrolle adenocarcinoma broncogénico en EN Erythema nodosum is an immune-mediated panniculitis (inflammation of the subcutaneous fat) caused by a type IV (delayed-type) hypersensitivity reaction. It commonly manifests in young women as tender, erythematous nodules on the shins. Erythema Nodosum comparación con el grupo no expuesto.
¿Cuál es el aumento de riesgo relativo en EN Erythema nodosum is an immune-mediated panniculitis (inflammation of the subcutaneous fat) caused by a type IV (delayed-type) hypersensitivity reaction. It commonly manifests in young women as tender, erythematous nodules on the shins. Erythema Nodosum el estudio citado en EN Erythema nodosum is an immune-mediated panniculitis (inflammation of the subcutaneous fat) caused by a type IV (delayed-type) hypersensitivity reaction. It commonly manifests in young women as tender, erythematous nodules on the shins. Erythema Nodosum la Pregunta 1?
Respuesta: El aumento del riesgo relativo = (Pe – Pc)/Pc = (18/50 – 7/50)/7/50 = 1,57, lo que significa que las personas expuestas al AL Amyloidosis humo de 2da mano en EN Erythema nodosum is an immune-mediated panniculitis (inflammation of the subcutaneous fat) caused by a type IV (delayed-type) hypersensitivity reaction. It commonly manifests in young women as tender, erythematous nodules on the shins. Erythema Nodosum la infancia tienen 1,57 veces más probabilidades de desarrollar adenocarcinoma broncogénico después de la exposición al AL Amyloidosis humo de 2da mano que los LOS Neisseria que no estuvieron expuestos.
USMLE™ es un programa conjunto de la Federation of State Medical Boards (FSMB®) y la National Board of Medical Examiners (NBME®). MCAT es una marca registrada de la Association of American Medical Colleges (AAMC). NCLEX®, NCLEX-RN® y NCLEX-PN® son marcas registradas del National Council of State Boards of Nursing, Inc (NCSBN®). Ninguno de los titulares de las marcas registradas está avalado ni afiliado a Lecturio.
Regístrate ahora y obtén acceso gratuito a Lecturio con páginas de concepto, videos médicos y cuestionarios para tu educación médica.