. Author manuscript; available in PMC: 2022 Apr 1.

Published in final edited form as: Am J Sports Med. 2021 Apr;49(5):1251–1261. doi: 10.1177/0363546521995182

Table 3.

Incidence of radiographic osteoarthritis

OA definition	ACL reconstructed knee	Contralateral knee	Present in ACL reconstructed knee and absent in contralateral knee
Definite osteophytes^*	43% (57/133)	10% (13/133)	37% (44/120)
Joint space narrowing^**	27% (35/133)	5% (7/133)	23% (29/126)

Definite osteophytes defined as KL grade 2 or higher, IKDC grade B or higher, and OARSI osteophyte grade 1 or higher (any compartment)

^**

Joint space narrowing defined as OARSI grade 1 narrowing or higher in any compartment.