Table 1.

Patients selection

→ 59	Patients who underwent IA injection of AAT
→ 22	Patients excluded from the study
	4–AAT injection were associated with AS debridement
	1–secondary knee OA after multiligamentous injury
	8–received additional IA injection with HA or PRP
	7–had to underwent surgical treatment (6 TKA, 1 AS debridement)
	2–with mental illness
→ 37	Included into statistical analysis
	31–bilateral IA injection (but only one joint was symptomatic)
	6–single joint IA injection