Figure 2.

Age-specific incidence rates by period and cohort-specific incidence rates by age group of female breast cancer across six most burdensome countries from 1990 to 2019. Note: The six most burdensome countries include China, Germany, India, Japan, Russian Federation, and the United States of America. (A) age-specific incidence rate, survey years were arranged into six consecutive 5-year periods from 1990-1994 (median 1992) to 2015-2019 (median 2017), longitudinal age curves were estimated by age-period-cohort model and indicated the expected age-specific rates of incidence. (B) cohort-specific incidence rate, people aged 20 to 79 were divided into twelve consecutive 5-year age groups from 20-24 (median 22) to 75-79 (median 77), thus we have 17 consecutive birth cohorts, including those born from 1908-1912 (median 1910) to 1988-1992 (median 1990).