Table 2.

National Collegiate Athletic Association Injury Surveillance Program (NCAA ISP) Exposure and Injury Variables, 2014–2015 Through 2018–2019

Exposure Variables	Injury Variables
Unique institution identifier	Unique institution identifier
Unique EMR identifier	Unique EMR identifier
Academic year	Academic year
Sport code	Sport code
Unique exposure identifier	Unique exposure identifier
Event date of scheduled event	Event date of scheduled event in which injury occurred
Event order within a single day	Event order within a single day
Event type	Event type
Number of participants for event	Season segment
Total roster size on day of event	Playing surface type
Season segment	Primary division of institution
Playing surface type	Sport division
Primary division of institution	Football divisiona
Sport division	Sampling weightb
Football divisiona	Unique athlete identifier
Sampling weightb	Class year
	Gender
	Unique injury event identifier
	Unique injury details identifier
	Injury order within a single injury event
	Injury diagnosis
	Body part or system affected
	Injury/illness group
	Body structure affected
	Side of body
	Basic injury mechanism
	Specific injury mechanism
	Player activity at time of injury
	Event segment type
	Location on playing surface at time of injury
	Player position at time of injury
	Medical professional performing injury assessment
	Urgently transported by emergency vehicle
	Surgery resulted from this injury
	New injury/injury recurrence
	Chronic injury
	Time lost due to injury
	Date returned to schedule team activities, even if with limitations/accommodations
	Concussion symptomsc,d
	Concussion symptom resolution timed

Abbreviation: EMR, electronic medical record.

^aVariables only applicable to football.

^bPoststratified by sport, year, division.

^cCaptured as distinct, dichotomously operationalized variables for concussion observations only (listed separately in Table 3).

^dCaptured for concussion observations only.