Age was not correlated with rates of BFI in either group across all analyses performed. This finding is consistent with the results reported by Brinkman et al.33 in the study of quantitative indexes of computed tomography in 28 patients with Alzheimer’s dementia and 30 elderly persons. Nevertheless, other authors34 have shown that age-related increases in BFI most probably reflect losses in adjacent brain structures including the caudate nuclei in normal aging.