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La exposición a la luz difiere según el sexo en los Estados Unidos, y las mujeres reciben menos luz brillante
1Division of Sleep Medicine, Harvard Medical School, Boston, MA, USA.
Npj biological timing and sleep
|September 2, 2025
Resumen
Los machos pasan mucho más tiempo en la luz que las hembras, una diferencia evidente desde la infancia. Estos distintos patrones de exposición a la luz pueden contribuir a las disparidades de salud basadas en el sexo, potencialmente vinculadas a las diferencias de actividad.
Área de la Ciencia:
- Cronología
- Salud del medio ambiente
- Fisiología humana
Sus antecedentes:
- La luz es una señal ambiental crítica que influye en los ritmos circadianos y la salud no circadiana.
- Las diferencias sexuales observadas en los resultados de salud pueden explicarse en parte por las variaciones en los patrones de exposición a la luz.
- Comprender estos patrones es crucial para las intervenciones de salud pública.
Objetivo del estudio:
- Para investigar las diferencias de sexo en los patrones de exposición a la luz del mundo real.
- Explorar posibles factores contribuyentes, incluida la actividad ocupacional y física.
- Evaluar la relación entre la exposición a la luz y los resultados para la salud.
Principales métodos:
- Análisis de los datos de la Encuesta Nacional de Salud y Nutrición (NHANES) (2011-2014).
- Medición de la exposición a la luz en el mundo real mediante dispositivos ActiGraph GT3X+ usados en la muñeca.
- Análisis estadístico que incluya pruebas t de dos muestras y modelos de regresión lineal ajustados a las covariables.
Principales resultados:
- Los machos exhibieron aproximadamente un 52% más de tiempo en luz brillante en comparación con las hembras.
- Se observaron diferencias significativas entre los sexos en la exposición a la luz en varios grupos de edad, comenzando en la infancia.
- Se estudiaron los niveles de actividad ocupacional y física como posibles factores explicativos de las diferencias observadas entre los sexos.
Conclusiones:
- Los machos y las hembras exhiben patrones distintos de exposición a la luz del mundo real, y los machos pasan más tiempo en la luz brillante.
- Estas diferencias basadas en el sexo en la exposición a la luz pueden desempeñar un papel en trayectorias de salud divergentes.
- Se requiere una investigación adicional para aclarar los mecanismos precisos y las implicaciones de estos hallazgos, posiblemente relacionados con las disparidades entre las actividades en interiores y al aire libre.
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