"Hierarchical and multivariate regression analyses were conducted to examine the relationship between artificial water fluoridation prevalence and ADHD prevalen

"Hierarchical and multivariate regression analyses were conducted to examine the relationship between artificial water fluoridation prevalence and ADHD prevalence after controlling for natural water fluoridation prevalence and SES, and SES respectively." ... "Moreover, results did not appear to be confounded by socioeconomic status because they remained consistent after controlling for this variable." ... "Moreover, artificial water fluoridation prevalence [compared with SES] even appeared to be the more robust predictor." Even if you have a problem with the stat analysis (i don't), The fact that it's a stronger predictor than SES is quite damning regardless of controls.