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Table 3 Guyatt's statistic and mean change in scales

From: The OnyCOE-t™ questionnaire: responsiveness and clinical meaningfulness of a patient-reported outcomes questionnaire for toenail onychomycosis

Scale

Worsened N = 12

Stable N = 37

Improved N = 400

Symptom Frequency

   

Mean Change

21.6

21.0

34.5

Guyatt's Statistic

.82

.80

1.31

Symptom Bothersomeness

   

Mean Change

1.5

18.9

24.1

Guyatt's Statistic

.05

.64

.81

Physical Activities Problems

   

Mean Change

18.3

9.0

30.1

Guyatt's Statistic

.55

.27

.91

Appearance Problems

   

Mean Change

16.3

12.7

34.4

Guyatt's Statistic

.53

.41

1.11

Overall Problem

   

Mean Change

22.2

25.2

44.0

Guyatt's Statistic

.57

.65

1.13

Stigma

   

Mean Change

4.7

5.3

15.4

Guyatt's Statistic

.18

.20

.58

Treatment Satisfaction

   

Mean Change

16.7

-2.1

46.1

Guyatt's Statistic

.62

-.08

1.72