Impact of gender and race on expectations and outcomes in total knee arthroplasty

Table 3 Outcome measures for 3 time points pre-op (T1), post-operative (4-8 wk) (T2), and post-operative (9-14 mo) (T3)

		n	Mean	SD	Mean rank	P
						T2 vs T11	T3 vs T11	T3 vs T21	Overall2
VAS	T1	133	7.64	1.99	2.71	0	0	0.02	0.05
	T2	103	4.81	2.61	1.93
	T3	52	4.02	3.44	1.36
EQ5D	T1	129	0.59	0.193	1.59	0.38	0	0.02	0.05
	T2	103	0.67	0.204	1.91
	T3	54	0.74	0.229	2.5
EQ5D-VAS	T1	131	69.31	20.435	1.71	0.66	0.01	0.2	0.05
	T2	105	75.52	17.04	1.96
	T3	54	76	17.1	2.33
KOOS-pain	T1	130	37.3	18.53	1.3	0.01	0	0	0.05
	T2	104	56	19.51	1.91
	T3	54	70.87	25.38	2.79
KOOS-symptom	T1	130	40.64	15.71	1.27	0	0	0.07	0.05
	T2	105	55.19	14.59	2.14
	T3	56	61.54	18.22	2.59
KOOS-ADL	T1	129	42.22	20.97	1.32	0	0	0.01	0.05
	T2	105	64.42	21.29	2.04
	T3	54	70.7	26.31	2.64
KOOS-sport	T1	130	38.61	37.9	1.51	0.05	0	0.05	0.05
	T2	103	55.16	41.11	2
	T3	55	62.29	37.32	2.49
KOOS-QOL	T1	130	17.17	18.99	1.34	0	0	0.01	0.05
	T2	104	34.31	19.95	2.02
	T3	55	47.29	30.93	2.64

¹Each row tests the null hypothesis that the sample 1 and sample 2 distributions are the same. Asymptotic significances (2-sided tests) are displayed. The significance level is 0.05. Significance values have been adjusted by the Bonferroni correction for multiple tests;

²Related samples, Friedman’s two-way analysis of variance by Ranks.