Variations in breast cancer incidence per decade o

Authors: Ruffo FreitasJunior Nilceana Maya Aires Freitas Maria Paula Curado Edesio Martins Marise Amaral Rebouças Moreira Carleane Maciel Bandeira e Silva

Publish Date: 2008/02/19

Volume: 19, Issue: 7, Pages: 681-687

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Abstract

Between 1988 and 2003 3312 new cases were recorded The crude and standardized incidence rates were calculated ANOVA was used to obtain the coefficient of determination R2 for the incidence over the course of the years and pvalues were obtained both by linear and by polynomial regressionThe increases in crude and standardized incidence were statistically significant in all age groups except for women between 20 and 29 years old For the age group from 30 to 49 years the increase in incidence was around 100 p = 0001 and from 50 to 59 years 277 p  0001 More modest increases of around 50 were observed in the age groups from 60 to 79 years p = 0013 For the women aged 80 years and over the increase was 272 p = 0015There were significant increases in the crude and standardized incidence rates for breast cancer in the city of Goiânia The women in the age group from 50 to 59 years were the ones who presented the highest increase in incidence More wideranging epidemiological studies therefore become necessary for defining the factors that are possibly related to this excessive increase in breast cancer incidence in certain specific segments of the female population

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