Incidence rate of female breast cancer in urban Shijiazhuang in 2012 and modifiable risk factors

Abstract

Background: Breast cancer is diagnosed more frequently among urban than rural women in China; however, the incidence among women in Shijiazhuang is unknown.

Methods: As registered Chinese citizens are entitled to complete public medical insurance coverage, the incidence rate was estimated using reimbursement records of first hospitalization.

Results: Breast cancer is the most common cancer among women in Shijiazhuang. The crude rate and age-standardized incidence rates by China (ASRC) and world (ASRW) standards were 59.6, 48.5 and 45.5/100 000 in 2012. Mean age at diagnosis was 55.1 years. Incidence increased with age, peaking at 165.1 at 70-74. In comparison with urban women in other Chinese cities, incidence in Shijiazhuang was similar to Shanghai (ASRC 46.6) and Suzhou (ASRW 45). When compared with 31 other Chinese cities, Shijiazhuang ranked second highest behind Guangzhou (ASRW 46.6), and the ASRW correlated significantly with gross domestic product per capita among the 32 cities. The breast cancer ASRW in Shijiazhuang was 2.7 times the rate of 41 rural Chinese counties (17). When compared with GLOBOCAN 2012 data according to the Human Development Index, breast cancer incidence in Shijiazhuang matched countries with a high human development index (ASRW 45.2).

Conclusion: Breast cancer incidence in Shijiazhuang in 2012 was the highest in China, matching the rate in countries with high social economic development. This rate may continue to rise, parallel with urbanization, and may be associated with changing reproductive patterns and Westernization. Prevention methods need to be incorporated.

Keywords: Birth rate; female breast cancer; urban Shijiazhuang; urbanization; westernization.