In breast cancer, are treatments and survival the same whatever a patient's age? A population-based study over the period 1998-2009

Aim The present study aimed to describe treatments, relative survival and prognostic factors in breast cancer patients according to age. Methods All women with primary invasive breast cancer, diagnosed from 1998 to 2009 in the department of Cote d'Or, were retrospectively selected. Variations in treatments administered according to age ( 74 years) and period were assessed using Cochran–Armitage trend tests and χ2-tests, respectively. Prognostic factors according to age were estimated using a generalized linear model with a Poisson error structure. Results Overall, 4305 women were included. The oldest women (aged >74 years) were more likely than the youngest women to have comorbidities, adva…