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Table 3 Internal Consistency of the TSQM-9 Items

From: Validation of an abbreviated Treatment Satisfaction Questionnaire for Medication (TSQM-9) among patients on antihypertensive medications

  Time 1 Time 2
Items and Domains Item-total correlation Cronbach's Alpha Item-total correlation Cronbach's Alpha
Effectiveness   0.935   0.924
   How satisfied or dissatisfied are you with the ability of the medication to prevent or treat your condition? 0.878   0.840  
   How satisfied or dissatisfied are you with the way the medication relieves your symptoms? 0.904   0.892  
   How satisfied or dissatisfied are you with the amount of time it takes the medication to start working? 0.819   0.805  
Convenience   0.911   0.915
   How easy or difficult is it to use the medication in its current form? 0.791   0.799  
   How easy or difficult is it to plan when you will use the medication each time? 0.841   0.854  
   How convenient or inconvenient is it to take the medication as instructed? 0.834   0.833  
Global Satisfaction   0.837   0.848
   Overall, how confident are you that taking this medication is a good thing for you? 0.755   0.768  
   How certain are you that the good things about your medication outweigh the bad things? 0.684   0.698  
   Taking all things into account, how satisfied or dissatisfied are you with this medication? 0.694   0.684  
  1. Time 1 = Day of first IVRS call after enrollment; Time 2 = Time 1 + 7 to 14 days