I don't have a specific breakdown data on types of falls in the elderly but one category that is common is falls in the bathrooms. Switching to curbless showers (which have become more common in general in North America) reduces shower falls in the general population and (I've been told by people in the industry) reduces falls especially in the elderly. There are likely many small aspects of household design that can help here in similar ways.
This Chart Shows The Worst Diseases That Don't Get Enough Research Money
We have already covered this topic several times on LW, but what prompted me to link this was this remark:
[Edit: a former, dumber version of me had asked, "I wonder what criterion the author would prefer," before the correct syntax of the sentence was pointed out to me.]
Opinions?