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Table 11 Comparison of effect sizes for differences between the DTSQc and DTSQsDiff scores

From: The Diabetes Treatment Satisfaction Questionnaire change version (DTSQc) evaluated in insulin glargine trials shows greater responsiveness to improvements than the original DTSQ

Study

At Ceiling (("AC")/ At Floor ("AF")

t (df)

D (= Z of difference between t for DTSQc and t for DTSQsDiff)

Z of difference between D in the AC/Not AC groups or in the AF/Not AF groups

  

DTSQc Questionnaire

DTSQsDiff Questionnaire

  

Treatment Satisfaction

Type 1

AC

15.64 (95)

-2.44 (91)

10.15

3.83****

 

Not AC

11.97 (97)

3.30 (94)

4.73

 

Type 2

AC

27.10 (89)

0.39 (83)

11.23

4.05****

 

Not AC

26.81 (52)

7.37 (50)

5.51

 

Perceived Hypoglycaemia

Type 1

AF

-4.73 (95)

6.65 (91)

-7.54

-6.71****

 

Not AF

-3.48 (99)

-6.62 (100)

1.94

 

Type 2

AF

-7.37 (114)

4.79 (113)

-8.07

-7.47****

 

Not AF

-2.70 (32)

-7.40 (29)

2.49

 

Perceived Hyperglycaemia

Type 1

AF

-5.48 (33)

2.85 (33)

-5.22

-5.73****

 

Not AF

-2.14 (159)

-6.45 (156)

2.88

 

Type 2

AF

-3.15 (27)

2.77 (28)

-3.84

-4.08****

 

Not AF

-2.27 (113)

-10.32 (116)

1.93

 
  1. (**** <0.0001)