Figure 14

Breast cancer risk maps (3 scenarios) used in the simulation procedure, and the corresponding directional semivariograms. The fill color in each county represents the mortality risk over the period 1970–1994 (age-adjusted mortality rate per 100,000 person-years). Three scenarios are considered for the risk values: risk estimated from the age-adjusted mortality rates of Figure 1 by Poisson kriging, smooth map of regional risks, and non-structured map of risk created by random shuffling of the scenario 1 map.