• Several studies have identified advanced maternal age as a risk factor for Alzheimer's
disease. This study evaluated maternal and paternal age at birth of 237 patients with
Alzheimer's disease, each of whom was matched to five control subjects based on sex, year
of birth, survival age, and location of residence. It was found that decreased paternal age
substantially increased the susceptibility to the common form of Alzheimer's disease that
occurs after the age of 67 years, whereas advanced maternal age had a negligible effect on …