Fig. 1From: sparrpowR: a flexible R package to estimate statistical power to identify spatial clustering of two groups and its applicationComparison between the census tract of Fort Dodge, Iowa (Left) and the first iteration of simulated data (Right). Using sparrpowR, 8 cases and 428 controls were generated assuming multivariate normal distributions with standard deviations of 0.83 and 1.67 km, respectively. Simulated case locations are red-colored dots and simulated control locations are blue-colored dots. The identified concentrated animal feeding operation (CAFO) is signified by the black “X” symbol. The blue lines represent regions with radii of 5 and 10 km from the identified CAFOBack to article page