Myth.  Mice really don't care about perfumy odors, or any other as far as I can tell.  They also don't mind living in close proximity to rotting fellow dead mice.  I have a blueberry farm and with massive quantity of fruit comes lots of rodents.   Wire mesh is about all that deters them.  There are some good traps available as well.  If you poison them you will also be poisoning critters that eat the dying mice, and they have a knack for finding a place to crawl into while dying that produces maximum odor if they have gotten inside anything.

Steve