Table 2.

2-year changes in WOMAC Function and KOOS Pain Scores for the Two Samples

	Surgical Sample		Non-surgical Sample
	KL Worsening Mean (sd)	No KL Worsening Mean (sd)	KL Worsening Mean (sd)	No KL Worsening Mean (sd)
WOMAC Function
Change Scores#
Changes from	18.6 (11.2)	5.7 (9.2)	−2.4 (13.4)	−2.2 (11.2)
Session 1 to 3+	(n=27)	(n=72)	(n = 13)	(n = 247)
KOOS Pain
Change Scores*
Changes from	−16.7 (14.1)	−5.5 (15.6)	5.2 (18.4)	5.0 (17.2)
Session 1 to 3+	(n=28)	(n= 75)	(n = 13)	(n=237)

^#WOMAC Function scores range from 0 to 68 with higher scores indicating worse function. Change scores are coded such that positive changes indicate worsening and negative scores indicate improvement in function.

^*KOOS Pain scores range from 0 to 100 with 100 indicating no pain during functional activities. Change scores are coded such that positive changes indicate improvement and negative scores indicate worsening in pain during functional activities.

⁺p<0.001 for the surgical sample