Table 1.

Characteristics of baseline cohort

Cohort (n =  17,682)
	%	Number
Gender
Male	56.6	10,013
Female	43.4	7669
Age at index ACL reconstruction (years)
13–15	7.4	1300
16–20	28.7	5057
21–25	20.7	3667
26–30	14.2	2513
31–35	10.0	1777
36–49	18.9	3350
Meniscus injury present (medial and/or lateral) at index surgery
Yes	43.8	7743
No	56.2	9939
Cartilage injury present at index surgery
Yes	26.0	4598
No	74.0	13,084
Meniscus and/or cartilage injury at index surgery
Yes	54.8	9685
No	45.2	7997