Figure 4.

Urban-rural age-specific incidence of breast cancer in Gharbiah, Egypt from 1999–2006. There are 12 categories of age: 0–24, 25–29, 30–34, 35–39, 40–44, 45–49, 50–54, 55–59, 60–64, 65–69, 70–74, >75. Each point on the lines of the graph corresponds to one age category. The sequence of age categories for each year is as given above.