dr. diane meier from the icahn school of medicine at mt. sinai. she wasn't an author of this particular study, but she's one of the nation's leaders in improving care for the elderly. so, dr. meier, what is it that most jumped out at you about this study? >> i think what most jumped out at me, and i hope to the general public about this study, is the realization that so much of healthcare is not covered by medicare or regular insurance and that a great deal of the needs of ol'er adults who need help during the day, particularly those who have memory problems, come right out of the pockets of the patient and the family. >> brangham: so is that why we see the huge disparity, why people caring for people with dementia are paying so much of their own money to care for their loved ones? >> that is the reason. people with dementia, that disease is characterized by a progressive loss of ability to take care of yourself -- to dress yourself, bathe yourself, feed yourself, to have judgment to be safe. what that means is you can't leave a dementia patient al