Is there any empirical research showing that placing sanitizer in door handles (as opposed to next to the door, or in the hallway, or wherever- - most hospitals have sanitizer everywhere) has an increase in use - especially for caregivers?
Unsure. In the hospitals I've worked at, there are sanitizing stations mounted either directly outside of any n-set of rooms (in ER's, they're mounted outside every room). It's habit for any health personnel to sanitize on the way in, rub a bit, wash hands at sink, and sanitize on the way out. In some cases (should theoretically be all...but hey, we're lazy) we wash on the way out as well.