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Table 5 The Distributional and Scale Characteristics of the TSQM

From: Validation of a general measure of treatment satisfaction, the Treatment Satisfaction Questionnaire for Medication (TSQM), using a national panel study of chronic disease

 

Scale Mean (SD)

Cronbach's Alpha

% Scores at Scale Ceiling

Skewness**

TSQM Scales

VAS Method (n = 287)

Likert Method (n = 280)

VAS Method

Likert Method

VAS Method

Likert Method

VAS Method

Likert Method

Effectiveness

69.7 (21.8)

68.6 (20.4)

.87

.88

13.0%

8.9%

-.47

-.76

Side effects

84.3 (19.2)

83.7 (19.5)

.84

.88

44.3%

41.1%

-1.1

-1.2

Convenience

84.9 (19.7)

83.2 (18.7)

.86

.90

44.9%

36.8%

-1.3

-1.1

Global Satisfaction

78.0 (20.4)

71.1 (22.6)

.80

.86

25.1%

12.9%

-.81

-.97

  1. ** Skewness Standard Error VAS Method = .14, Likert-type Method = .15