Suppose that in the year 2000 there are 10,000,000 Chinese women age 40 years with no prior breast cancer. What is the expected number of breast cancer cases in this group by the year 2025? (Assume no deaths during this period.) 

Another aspect of the study is to use the SWHS data to predict the long-term incidence of breast cancer in Chinese women. Those incidence data are presented in Table 5.7.

Table 5.7 Incidence rate of breast cancer by age in the SWHS

Age _________________ Annual incidence per 105 women

40–44 …………………………………. 63.8

45–49 …………………………………. 86.6

50–54 …………………………………. 92.6

55–59 …….…………………………. 107.0

60–64 ……………………………….. 120.9