Figure 5From: Spatial heterogeneity of type I error for local cluster detection testsSize of the at-risk population for each SU in the Auvergne region, as defined by mean number of live births per year between 1999 and 2006 (source: INSEE). Q1: ≤ 17; Q2: > 17 and ≤ 35; Q3: > 35 and ≤ 70; Q4: > 70.Back to article page