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Table 3 The responsiveness of correlation and ROC curve analyses for each questionnairea

From: Comparison of the responsiveness of the WOMAC and the 12-item WHODAS 2.0 in patients with Kashin–Beck disease

Questionnaires

Correlation analysis

ROC curve analysis

Coefficient b

p-value

AUC (95% CI)

Optimal cutoff value

Sensitivity

Specificity

WOMAC

 Pain

0.52

< 0.001

0.76 (0.69, 0.83)

22.50

0.68

0.76

 Stiffness

0.46

< 0.001

0.74 (0.67, 0.81)

6.25

0.89

0.53

 Function

0.45

< 0.001

0.74 (0.67, 0.81)

14.70

0.74

0.68

 Total score

0.52

< 0.001

0.77 (0.70, 0.83)

10.41

0.83

0.60

WHODAS 2.0

 Cognition

0.22

0.001

0.64 (0.56, 0.72)

−18.75

0.89

0.31

 Mobility

0.41

< 0.001

0.72 (0.65, 0.80)

6.25

0.76

0.58

 Self-care

0.26

< 0.001

0.64 (0.56, 0.72)

18.75

0.60

0.67

 Getting along

0.04

0.509

0.55 (0.46, 0.64)

18.75

0.43

0.68

 Life activities

0.40

< 0.001

0.68 (0.61, 0.76)

−6.25

0.91

0.39

 Participation in society

0.38

< 0.001

0.68 (0.60, 0.76)

6.83

0.70

0.58

 Total score

0.38

< 0.001

0.71 (0.63, 0.78)

22.31

0.51

0.82

  1. ROC receiver operating characteristic, AUC area under the curve, CI confidence interval, WOMAC Western Ontario and McMaster Universities Osteoarthritis index, WHODAS 2.0 World Health Organization Disability Assessment Schedule 2.0 (12-item)
  2. a The external criterion was the joint dysfunction index (JDI)
  3. b Spearman’s correlation coefficient was used