Some of this sounds like low stats fluctuations to me. In a town of 100, a single family of people has an outsized impact on the apparent prevalence. Cities hav

Some of this sounds like low stats fluctuations to me. In a town of 100, a single family of people has an outsized impact on the apparent prevalence. Cities have enough population to accurately measure it, while towns will fluctuate wildly about the mean. Small towns should have both the strongest and weakes associations if stats dominated, which sounds like it's the case.