Factors affecting the quality of life after total knee arthroplasties: a prospective study

Table 3 Differences in QoL scores between the examine intervals (baseline,6 weeks,3 -6-12-months)*

	Baseline-6 weeks	6 weeks-3 months	3 months-6 months	6 months-12 months	Baseline-12 months	Effect size Baseline-12 m
WOMAC
Pain	3.1(1.9-4.2)†	4.0(2.9-5.3)†	1.8(1.4-2.4)†	1.3(0.5-1.0)†	10.2(9.4-11.5)††	2.5
Function	1.8(−1.2- 5.4)	16.5(13.5-18.8)†	9.4(7.4(11.2)†	3.5(5.0-1.9)†	31.2(28.8-34.7)††	2.7
Stiffness	0.6(−0.1-1.4)	1.0(0.7-1.3)†	0.8 (0.5-0.9)†	0.9 (0.6-1.0)†	3.3(2.8-3.7)††	2.0
KSS
Knee score	-	−36.7(−41.2- -32.3)†	−8.6(−11.1- -6.1)†	−2.9(1.1-4.7)†	−48.7(−54.5-45.2)††	2.7
Function score	-	−17.2 (−20.4- -3.7)†	−11.5(−14.2 -8.8)†	−5.6(−7.7 -3.4)†	−34.2(−37.5-30.8)††	2.8
Pain VAS	2.6(2.0-3.1)†	2.0(1.6-2.5)†	1.7(1.2-2.1)†	0.8(−0.4 - 1.1)	7.1(6.5-7.6)††	3.9
CES-D10	1.5(−0.3-3.1)†	2.8(1.6-4.1)†	1.2(0.3 -2.3)†	1.0(−0.3-1.8)†	6.6(4.9-7.9)††	1.0

* Values are mean (95% confidence interval of the difference); Repeated measures GLM with post-hoc Bonferroni’s correction.
† P < 0.05 †† P < 0.001; - Not applicable.
WOMAC scores:pain 0–20,function 0–68,stiffness 0–8,higher scores indicate greater difficulty.
KSS: Knee score 100–0, Functional score 100–0, higher scores indicate a better health state.
CES-D10 scores: > 10 indicate depression; Pain VAS: 0–10, better to worse.

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