Table 1.

Demographic data, injury type, activity classification, and frequency

Injury Type	ACL 106 (40.3%)	AKP 82 (31.2%)	PAT 38 (14.4%)	MT 17 (6.5%)	COL 14 (5.3%)	OTH 6 (2.3%)
Activity Classificationa	Contact 135 (51.7%)	Limited Contact 65 (24.7%)	No Contact 62 (23.6%)
Activity frequency by classification	Basketball (63)Hockey (1)Lacrosse (1)Soccer (70)	Baseball (1)Cheer-dance (6)Gymnastics (7)In-line skate (1)Downhill ski (11)Softball (14)Ultimate Frisbee (3)Volleyball (15)Other, sport (7)	Aerobics class (1)Cross-country (7)Dancing (4)Exercise class (5)Jog/running (14)Swimming (5)Tennis (2)Track and field (15)Walking (3)Weight training (1)Other, exercise (5)

ACL, anterior cruciate tear; AKP, anterior knee pain includes patellofemoral stress syndrome, patellar tendonopathy, fat pad impingement, Osgood Schlatter disease, medial plica irritation, and iliotibial band syndrome; PAT, patellar dislocations and subluxations; MT, meniscal tears; COL, collateral ligament sprain; OTH, other knee injuries including contusions, intra-articular loose bodies, and osteochondritis dissecans and fractures.

^aAmerican Academy of Pediatrics Committee on Sports Medicine and Fitness Classifications of Sport by Contact.¹¹