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Table 3 Baseline, follow-up, change scores, effect size (ES) and standardised response mean (SRM) of the QuickDASH and PSFS according to the GROC category

From: Responsiveness and minimal important change of the QuickDASH and PSFS when used among patients with shoulder pain

GROC category

N (%)

Instrument

Baseline score, mean (SD)

Follow-up score, mean (SD)

Change score, mean (SD)

ES

SRM

Total sample

106

QuickDASH

PSFS

39.7 (17.2)

3.2 (1.7)

30.0 (18.7)

5.3 (2.4)

10.3 (13.1)

− 2.1 (2.4)

0.6

1.2

0.8

0.9

Very much improved

14 (10.4)

QuickDASH

PSFS

38.0 (16.8)

3.9 (2.0)

11.7 (11.7)

7.9 (2.2)

26.6 (15.4)

−4.1 (2.6)

1.6

2.1

1.7

1.6

Much improved

36 (26.9)

QuickDASH

PSFS

35.5 (14.4)

3.3 (1.6)

22.7 (13.2)

6.1 (2.0)

12.9 (11.2)

−2.6 (2.0)

0.9

1.6

1.2

1.3

Slightly improved

34 (25.4)

QuickDASH

PSFS

43.0 (17.3)

2.8 (1,8)

35.9 (17.5)

4.4 (1.6)

7.1 (11.1)

−1.6 (2.4)

0.4

0.9

0.6

0.7

Unchanged

18 (13.4)

QuickDASH

PSFS

48.1 (17.6)

2.9 (1.5)

47.2 (16.6)

3.5 (1.8)

0.9 (8.7)

−0.6 (1.4)

0.1

0.4

0.1

0.4

Slightly worsened

3 (2.2)

QuickDASH

PSFS

65.5 (16.6)

2.8 (1.1)

55.3 (13.3)

1.8 (1.4)

10.2 (3.4)

0.9 (0.5)

0.6

−0.8

3.0

−1.8

Much worsened

1 (0.7)

QuickDASH

PSFS

-

-

-

-

-

-

-

-

-

-

Very much worsened

0 (0.0)

QuickDASH

PSFS

-

-

-

-

-

-

-

-

-

-

  1. Abbreviations: ES = effect size; GROC = global rating of change scale; NRS = numeric pain rating scale; PSFS = Patient-Specific Functional scale; SRM, standardised response mean; QuickDASH = Quick Disabilities of the Arm, Hand and Shoulder questionnaire