Fig. 7From: Assessment of the spatial accessibility to health professionals at French census block levelDistribution of the composite ISA stratified by level of the composite provider-population ratios. (a) composite PPRs = 0 meaning that there is no healthcare professional within the IRIS and (b) composite PPRs > 0 meaning that there is at least one healthcare professional within the IRIS. We can see that ISA is normally distributed when PPRs = 0Back to article page