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Instituto Nacional de Salud Pública

2013, Número 2

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salud publica mex 2013; 55 (2)


Asociación entre las mediciones de PM2.5 por absorbancia y la distancia a vías de alto tráfico en la zona metropolitana de la Ciudad de México

Cortez-Lugo M, Escamilla-Núñez C, Barraza-Villarreal A, Texcalac-Sangrador JL, Chow J, Watson J, Hernández-Cadena L, Romieu I

Idioma: Ingles.
Referencias bibliográficas: 40
Paginas: 155-161
Archivo PDF: 353.04 Kb.


RESUMEN

Objetivo. Evaluar la relación entre las mediciones de absorción de luz de las PM2.5 a diferentes distancias de vías de tráfico y el aforo vehicular de diesel en la Ciudad de México. Material y métodos. Se realizaron mediciones de PM2.5 y su análisis de babs en tres zonas de la Ciudad de México. Se usaron modelos GEE para evaluar el efecto de la distancia y el aforo vehicular de tráfico pesado sobre PM2.5 babs. Resultados. Se observó una tendencia decreciente en la mediana de PM2.5 babs conforme se incrementó la distancia a las avenidas de alto tráfico (p‹0.002); los niveles decrecen en 7% (CI95% 0.9-14) por cada 100 metros de incremento. Las mediciones de PM2.5 babs se incrementan en 20% (CI95% 3-38) cuando el aforo vehicular a diesel es mayor de 150 en una hora. Conclusiones. Las mediciones de PM2.5 babs están significativamente asociadas con la distancia de avenidas con a-lto tránsito vehicular y con vehículos de diesel.


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