Appendix Table 1.

Instagram Post Content Classification System

Content Topic	Description
Educational posts	Posts trying to teach a concept, announcing seminars or learning opportunities, or presenting physical examination findings and demonstrations
OR image posts	Posts of images in the OR
Social posts	Posts regarding vacations, hobbies, luxury items, food, sporting events, concerts, or festivals
Informational posts	Posts providing information about the residency program
Self-promotion posts	Advertisement-style posts about clinical practice targeted toward patients or program “advertising”
Visiting lecturer posts	Any post making mention of a guest speaker or visiting lecturer
Research posts	Posts regarding publications, abstracts, posters, conferences, research awards, or grants
Other posts	Posts not specified in aforementioned categories

OR, operating room.