Organophosphate Pesticides and ADHD

BOSTONChildren exposed to higher levels of organophosphate pesticides appear more likely to be diagnosed with attention deficit hyperactivity disorder (ADHD), according to a new study (Pediatrics. ePub 17 May 2010; DOI: 10.1542/peds.2009-3058). Researchers out of Harvard University reviewed data on 1,139 children from the National Health and Nutrition Examination Survey (20002004). Out of the sample, 119 children met the diagnostic criteria for ADHD. Those with higher urinary concentrations of dialkyl phosphates, especially dimethyl alkylphosphate (DMAP), were more likely to be diagnosed as having ADHA. A 10-fold increase in DMAP concentration was associated with an odds ratio of 1.55, while children with higher than the median concentration level of dimethyl thiophosphate had twice the odds of ADHD, although studies are needed to determine whether the link is causal.

The Organic Trade Association (OTA), Greenfield, Mass., issued a statement on the study, noting the use of organophosphates is prohibited in organic production. Studies have increasingly shown the importance of minimizing young childrens exposure to even low levels of chemical pesticides, said Christine Bushway, executive director, OTA. This study adds to that wealth of knowledge and arms parents with information that helps them reduce their childrens pesticide intake. Organic food production and processing is the only system that uses certification and inspection to verify that these chemicals are not used. Those seeking to minimize their exposure to these chemicals can look for the USDA Organic label wherever they shop.