Table 2 Comparison of WOMAC scores among EQ-5D-5L response levels at baseline in 2018 (N = 151)

Mobility

< 0.001†

0.022†

< 0.001†

< 0.001†

1–2 (38, 70)

− 2.238

0.003*

− 0.100

0.801*

− 7.403

0.001*

− 9.948

0.002*

2–3+ (70, 43)

− 2.617

< 0.001*

− 0.954

0.014*

− 7.181

0.001*

− 10.855

< 0.001*

Self-Care

< 0.001†

0.036†

< 0.001†

< 0.001†

1–2 (110, 30)

− 1.936

0.014*

− 0.804

0.050*

− 7.107

0.002*

− 10.033

0.002*

2–3+ (30, 11)

− 3.818

0.005*

− 0.421

0.545*

− 12.879

0.001*

− 17.118

0.002*

Usual Activities

< 0.001†

< 0.001†

< 0.001†

< 0.001†

1–2 (63, 55)

− 2.404

< 0.001*

− 1.439

< 0.001*

− 10.056

< 0.001*

− 14.010

< 0.001*

2–3+ (55, 33)

− 3.152

< 0.001*

− 0.552

0.174*

− 8.939

< 0.001*

− 12.721

< 0.001*

Pain/Discomfort

< 0.001†

< 0.001†

< 0.001†

< 0.001†

1–2 (14, 65)

− 1.623

0.112*

− 0.453

0.398*

− 5.682

< 0.089*

− 7.758

0.083*

2–3+ (65, 72)

− 3.974

< 0.001*

− 1.656

< 0.001*

− 8.922

< 0.001*

− 14.485

< 0.001*

Anxiety/Depression

< 0.001†

< 0.001†

< 0.001†

< 0.001†

1–2 (77, 50)

− 1.841

0.007*

− 0.907

0.006*

− 5.510

0.005*

− 8.289

0.002*

2–3+ (50, 24)

− 2.807

0.003*

− 1.702

< 0.001*

− 12.365

< 0.001*

− 16.983

< 0.001*