Breast Cancer in Mato Grosso: Epidemiological Profile and Incidence from 2001 to 2018

Introduction:  Breast cancer belongs to the group of non-communicable chronic diseases and is the most common among women in Brazil.

Objective:  To describe the incidence of female breast cancer according to sociodemographic characteristics, in the state of Mato Grosso, between 2001 and 2018.

Method:  Descriptive study using data from the Population-Based Cancer Registry from 2001 to 2018. New cases of female breast cancer diagnosed in Mato Grosso were taken into account, whose underlying cause belongs to Chapter II of the ICD-10, referring to cancers (tumors) and identified by the code C.50 (breast cancer). The relative frequencies were calculated according to race/skin color, age, marital status, and schooling, as well as the adjusted average breast cancer rates per municipality.

Results:  There were 7,748 new cases of female breast cancer between 2001 and 2018. The highest frequency occurred in brown women (41.9%), aged 40-59 (53.9%), married (25.4%), with a primary school education (9.1%). The category with no schooling information was 59.8 per cent and for marital status, 46.9 per cent. In 2001, the adjusted rate was 31.08, while the crude rate was 23.23 per 100,000 women. In 2018, the crude rate increased by 26 per cent (29.2/100,000 women), while the adjusted rate fell by 14 per cent (26.63/100,000 women).

Conclusion:  The results revealed that breast cancer continues to be a major concern in the state, with 7,748 new cases over 18 years and an average incidence rate of 28.7/100,000 women.

Key words:
Breast Neoplasms; Carcinoma, Ductal, Breast; Breast Carcinoma in situ; Incidence; Demography