Table 2. Content of semi-structured phone interview with middle school athletes, parents, staff.

Content	Included in specific sport group’s interview protocol?
	Athlete	Parent	Staff
General (e.g., how did you/your child get involved in sports?)	X	X	X
School-related factors (e.g., What is a typical day like for you with middle school sports?)		X	X
Middle school sport regulation (e.g., There are policies and rules about sport safety and concussion. What do you think are the benefits and consequences of having these in place?)			X
Sport safety and concussions (e.g., What comes to mind when you hear the word “concussion”?)		X
Education for sport safety and concussions (e.g., What motivates you to talk about concussions with others?)	X	X	X
Communication within sport (e.g., As a parent, how involved are you in your child’s team?)	X	X	X
Education and information (e.g., What did you learn about concussions in your sport this past season?)	X	X	X
Closing (e.g., Does anyone have any other topics to talk about or final comments/suggestions before we end?)	X	X	X