More than a decade ago we had to digitize some org’s patient cards into a database. After running few “test” queries against that dataset out of curiosity we found out that you’re less likely to be alcoholic-y if you live on 4-5 floor. The explanation I thought was that they hang out outside, but those who live higher have harder time to go home and prefer to not go. Building with 6+ stories usually have an elevator and “the problem” disappears.