While this is neither here nor there wearing scrubs out is a relatively new phenomenon. In fact, even wearing them around the hospital is pretty new too. They started as something you changed into when needed and then changed out of when the procedure was over.
Yeah I'd say it started probably in the 90s and by maybe the early 2010s it was acceptable to wear scrubs in any sort of medical situation. Like even the receptionists at a opthalmologist would wear them.