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Los autores analizaron una asociación entre tabaquismo y cáncer de mama en un muestra de 22.000 mujeres de edades que tenían entre 40 y 59 años, en 1990.
Un total de 180 mujeres desarrollaron tumor mamario en el año 1999. De ellas, 5,7% eran fumadoras habituales, un 1,7 ex fumadoras y un 92,6% no habían fumado nunca. El 69% de estas últimas, no obstante, declararon que estaban normalmente expuestas a la humo del tabaco.
Comparadas estas últimas pacientes con otros grupos de no fumadoras ni pasivamente, que todavía no habían llegado a la menopausia, presentaban tres veces más de riesgo de desarrollar cáncer de mama que las fumadoras.
Por otra parte, entra las mujeres posmenopáusicas fumadoras, no se observó riesgo aumentado de padecer tumor de mama. Además, las mujeres fumadoras pasivas premenopáusicas, pero no las posmenopáusicas, tenían 2,6 veces más de riesgo de sufrir cáncer de mama.
Webs Relacionadas
International Journal of Cancer
National Cancer Center