Table 4.

Secondary analyses adjusted for stratification variables^*

	No. patients in analysis		OR	95% CI	P
	Intervention	Usual care
KOOS average score
3 months	75	71	2.91	(0.62, 13.67)	0.177
6 months			2.52	(0.51, 12.59)	0.260
12 months			2.57	(0.52, 12.70)	0.247
KOOS QOL score
3 months	84	77	1.05	(0.38, 2.92)	0.926
6 months			2.37	(0.81, 6.93)	0.114
12 months			1.84	(0.63, 5.37)	0.264
KOOS ADL score
3 months	80	75	5.37	(1.37, 21.04)	0.016
6 months			3.22	(0.76, 13.59)	0.112
12 months			2.17	(0.52, 9.11)	0.291
KOOS pain score
3 months	84	76	2.24	(0.70, 7.13)	0.173
6 months			1.64	(0.48, 5.58)	0.426
12 months			2.82	(0.79, 10.11)	0.111
KOOS sport/rec score
3 months	82	74	2.27	(0.62, 8.32)	0.216
6 months			2.14	(0.61, 7.54)	0.235
12 months			2.30	(0.65, 8.19)	0.199
KOOS symptoms score
3 months	85	77	1.74	(0.53, 5.71)	0.364
6 months			1.72	(0.49, 6.02)	0.393
12 months			1.89	(0.49, 6.50)	0.377
HADS anxiety score
3 months	84	76	1.07	(0.14, 8.02)	0.946
6 months			1.61	(0.22, 11.99)	0.644
12 months			2.48	(0.36, 17.18)	0.358
HADS depression score
3 months	84	77	0.25	(0.05, 1.39)	0.114
6 months			0.77	(0.13, 4.56)	0.769
12 months			0.57	(0.11, 2.86)	0.491
Satisfaction with surgery
3 months	79	71	0.82	(0.30, 2.24)	0.699
6 months			1.68	(0.57, 4.98)	0.348
12 months			2.00	(0.74, 5.39)	0.170
Satisfaction with physical therapy
3 months	84	77	0.06	(0.02, 0.20)	<0.001
6 months			0.14	(0.04, 0.47)	0.002
12 months			0.10	(0.03, 0.37)	<0.001

^*Logistic regression accounting for clustering within patients for repeated measures, using contrasts and adjusted for stratification variables and preoperative outcome measures; assesses odds ratios (ORs) at 3, 6, and 12 months. 95% CI = 95% confidence interval; KOOS = Knee Injury and Osteoarthritis Outcome Score; QoL = quality of life subscale of the KOOS; ADL = function in daily living subscale of the KOOS; sport/rec = sport and recreation subscale of the KOOS; HADS = Hospital Anxiety and Depression Scale.