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Table 2 Mean change scores, ROC curve statistics and MIC values for the Quick-DASH at 3 and 6 months*

From: Responsiveness and minimal important change for the quick-DASH in patients with shoulder disorders

 

3 months

6 months

Absolute mean changes

 Improved

21.4 (18.4;24.3)

24.9 (21.8;28.0)

 Unchanged

1.8 (−1.27;4.91)

4.9 (1.0;8.8)

Relative mean changes, %

 Improved

58.1 (52.3;63.8)

68.7 (63.8;73.7)

 Unchanged

−3.3 (−19.1;12.6)

6.8 (− 8.8;22.3)

Absolute ROC AUC

0.84 (0.79;0.90)

0.83 (0.77;0.90)

Relative ROC AUC

0.86 (0.81;0.92)

0.90 (0.85;0.95)

MIC values

 MIC ROC a

9.1

13.6

 MIC 95% upper limit b

21.3

27.8

 MIC percentages c

33.3

41.7

  1. Abbreviations: AUC Area Under the Curve, MIC Minimal important change, ROC Receiver operating characteristics, Quick-DASH, shortened version of the Disabilities of the Arm, Hand and Shoulder
  2. *Values in parentheses are 95% confidence interval. 3 months: improved (n = 129); unchanged (n = 59), 6 months: improved (n = 125); unchanged (n = 51)
  3. a Estimated as the optimal cutoff point of the ROC curve using absolute change scores
  4. b Estimated as the 95% cutoff limit for the unchanged group
  5. c Estimated as the optimal cutoff point of the ROC curve using relative change scores