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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)