Table 4.

Changes of WOMAC and SF-36 in different CCI groups during follow-up.

	Preop(Group 1)	Post-op-3M (Group 2)	Post-op-6M (Group 3)	Post-op-1Y (Group 4)	Post-op-2Y (Group 5)	p
CCI
Preop CCI = 0	0 ± 0.00	0 ± 0.00	0 ± 0.00	0 ± 0.00	0 ± 0.00
Preop CCI = 1	1 ± 0.00	1 ± 0.00	1.08 ± 0.27	1.12 ± 0.36	1.18 ± 0.49	1 vs 4: p = 0.007; 1 vs 5: p < 0.001; 2 vs 4: p = 0.007; 2 vs 5: p < 0.001; 3 vs 5: p = 0.013
Preop CCI = 2	2 ± 0.00	2 ± 0.00	2.1 ± 0.31	2.3 ± 0.54	2.55 ± 0.73	1 vs 4: <0.001; 1 vs 5: p < 0.001; 2 vs 4: p < 0.001; 2 vs 5: p < 0.001; 3 vs 4: p = 0.001; 3 vs 5: p < 0.001; 4 vs 5: p < 0.001
Preop CCI = 3	3.82 ± 0.91	3.82 ± 0.91	3.98 ± 1.07	4.35 ± 1.19	4.97 ± 1.50	1 vs 4: p < 0.001; 1 vs 5: p < 0.001; 2 vs 4: p < 0.001; 2 vs 5: p < 0.001; 3 vs 4: p = 0.012; 3 vs 5: p < 0.001; 4 vs 5: p < 0.001
WOMAC-pain
Preop CCI = 0	13.18 ± 1.937	5.08 ± 0.862	4.07 ± 0.750	3.25 ± 0.907	2.787 ± 0.8778	<0.05
Preop CCI = 1	19.00 ± 2.441	9.33 ± 2.159	6.31 ± 1.775	4.79 ± 1.63	4.65 ± 1.70	4 vs 5: p = 0.628
Preop CCI = 2	24.28 ± 3.164	16.01 ± 3.260	11.66 ± 3.815	9.77 ± 3.08	10.02 ± 3.29	4 vs 5: p = 0.059;
Preop CCI ≥ 3	32.71 ± 4.618	25.27 ± 5.171	21.22 ± 5.42	20.40 ± 5.20	19.27 ± 5.60	3 vs 4: p = 0.223; 4 vs 5: p = 0.96
WOMAC-PF
Preop CCI = 0	42.43 ± 2.101	24.61 ± 2.246	22.15 ± 2.064	20.13 ± 2.506	20.656 ± 2.0321	4 vs 5: p = 0.188
Preop CCI = 1	46.44 ± 1.49	30.13 ± 2.979	26.62 ± 2.236	24.99 ± 2.796	23.12 ± 2.89	3 vs 5: p = 0.176;
Preop CCI = 2	50.09 ± 2.932	37.20 ± 3.212	33.26 ± 4.121	31.41 ± 3.919	32.94 ± 3.64	3 vs 5: p = 0.526;
Preop CCI ≥ 3	66.32 ± 9.376	57.07 ± 9.973	51.60 ± 10.299	51.29 ± 10.15	51.23 ± 10.21	3 vs 4: p = 0.816;3 vs 5: p = 0.776;4 vs 5: p = 0.959
SF-36-PF
Preop CCI = 0	51.93 ± 3.70	79.66 ± 4.06	80.57 ± 3.68	81.197 ± 3.59	80.787 ± 3.39	2 vs 3: p = 0.171; 2 vs 5: p = 0.091;3 vs 4: p = 0.352; 3 vs 5: p = 0.75; 3 vs 5 = 0.54
Preop CCI = 1	42.35 ± 5.78	66.57 ± 11.3	68.54 ± 9.62	68.39 ± 10.02	68.473 ± 9.556	3 vs 4: p = 0.913;4 vs 5: p = 0.95
Preop CCI = 2	34.39 ± 4.14	45.69 ± 8.13	53.32 ± 8.03	52.08 ± 8.28	53.23 ± 7.96	3 vs 4: p = 0.227;3 vs 5: p = 0.927;4 vs 5: p= 0.265
Preop CCI ≥ 3	25.25 ± 5.69	32.42 ± 8.85	39.6 ± 8.68	37.21 ± 8.96	38.60 ± 9.60	3 vs 5:0.363;4 vs 5: p = 0.207
SF-36-BP
Preop CCI = 0	50.74 ± 4.00	73.03 ± 4.42	74.46 ± 3.52	72.66 ± 2.71	71.95 ± 9.12	2 vs 3: p = 0.135;2 vs 4: p = 0.692;2 vs 5: p = 0.257; 3 vs 4: p = 0.059; 3 vs 5: p = 0.009; 4 vs 5 = 0.46
Preop CCI = 1	43.31 ± 6.45	73.26 ± 9.26	72.62 ± 4.77	70.50 ± 4.65	70.60 ± 4.3	4 vs 5: p = 0.907
Preop CCI = 2	38.86 ± 5.16	55.12 ± 7.01	69.61 ± 5.12	68.22 ± 4.52	68.57 ± 5.18	3 vs 4: p = 0.066;3 vs 5: p = 0.169;4 vs 5: p = 0.64
Preop CCI ≥ 3	31.57 ± 7.88	48.29 ± 9.23	62.73 ± 7.86	61.95 ± 9.27	59.76 ± 9.13	3 vs 4: p = 0.489;4 vs 5 = 0.052