Because of the long follow-up period of the study, in which participants who were dementia-free developed the condition many years later, this is a less likely explanation, but was not ruled out in the research, Saczynski said.
Melzer pointedly noted that in a more recent study, published earlier this year, his team found that those who developed coronary artery disease tended to have higher urine BPA concentrations up to ten years earlier than those who did not develop heart disease.