Thank you for the question.
On the front page of my questionnaire, I said that I had exclusion criteria. If there were major cognitive issues for a person--they'd had a stroke or something like that--then they were not to fill out the questionnaire themselves. All fall studies, unfortunately, have to exclude people with major cognitive impairment, because they just can't participate. It's an oversight that we can't find a solution to.
We did ask people to rate their memory compared with other people their own age. People who reported that their memory had changed over the past five years were more likely to fall. So it is a risk factor for falling.