DHA content in AD brain. Levels of DHA (A) and DHA-containing phosphatidylethanolamine (1-stearoyl,2-arachidonoyl-3-glycerophosphoethanolamine, B) in mid-frontal cortex of control subjects (open squares) and subjects with AD (closed circles). Statistical analyses were conducted using a linear regression analysis adjusting for age, gender and post mortem interval.