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[Using satisfaction questionnaire status version (DTSQs) to study on the reliability, construct validity and
Zhao-lan Liu1, Chao-wei Fu, Wei-qing Chen
1Department of Epidemiology, School of Public Health, Fudan University, Shanghai 200032, China.
Objective:
Using 'diabetes treatment satisfaction questionnaire status version (DTSQs)' to evaluate the reliability, validity and responsiveness, among Chinese type 2 diabetes mellitus (T2DM) outpatients.
Methods:
A cross-sectional study was carried out in 749 T2DM outpatients from seven hospitals in Guangzhou and Shanghai, China. The DTSQs was self-administered by patients, under the help from interviewers for those having difficulties in reading. Split-half reliability correlation coefficient, Cronbach alpha and Spearman' were used to test the reliability. Exploratory factor analysis (EFA) and confirmatory factor analysis (CFA) were employed separately to examine the construct validity of the scale. The responsiveness of the scale was appraised by the multiple analysis of covariance (MANCOVA).
Results:
The split-half correlation coefficient was 0.807 and the Cronbach alpha was 0.717 of the six items on satisfaction of treatment. The three factors extracted by EFA explained 67.656% of the overall variance. The relative chi2 was 4.95 and DK was 0.18 in the goodness of test by CFA. The vector of treatment satisfaction, perceived hyperglycemia and hypoglycemia were different in males versus females and in poor versus good blood glucose controlled groups. The DTSQs showed good reliability and validity among T2DM outpatients.
Conclusion:
DTSQs was applicable to Chinese T2DM patients.