Table 7. Adjusted Difference in Improvement in Health-Related Quality of Life and Satisfaction after Knee Replacement: A Comparison Between Patients with different Completed Levels of Schooling.

SF36 Sub-Scale	Adjusted difference per increasing Completed Levels of Schooling (95% CI)	p-value
Physical Functioning	−3.64 (−8.03–0.74)	0.10
Role-Physical	−9.38 (−18.4–−0.34)	0.04
Bodily Pain	−3.68 (−8.39–1.03)	0.13
General Health	−3.67 (−6.79–−0.56)	0.02
Vitality	1.78 (−1.51–5.08)	0.29
Social Functioning	−0.62 (−5.37–4.14)	0.80
Role Emotional	3.11 (−5.07–11.3)	0.46
Mental Health	3.60 (0.82–6.38)	0.01
PCS	−2.74 (−4.41–−1.07)	0.001
MCS	2.08 (0.37–3.79)	0.02
NRS Satisfaction	0.0 (−0.5–0.4)	0.83

Negative values indicate a higher mean improvement in HRQoL after TKR in patients with increasing Completed Levels of Schooling. The mean differences between education level are adjusted for age, sex, Body Mass Index and Charnley Classification of Comorbidity and stratified for quartiles of follow-up.