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Validation of measures of satisfaction with and impact of continuous and conventional glucose monitoring. Diabetes Technol Ther 2010 Sep;12(9):679-84



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2-s2.0-77955701774 (requires institutional sign-in at Scopus site)   67 Citations


BACKGROUND: The evaluation of patient-reported outcomes (e.g. impact, satisfaction) is important in trials of continuous glucose monitoring (CGM). We evaluated psychometric properties of the CGM Satisfaction Scale (CGM-SAT) and the Glucose Monitoring Survey (GMS).

METHODS: CGM-SAT is a 44-item scale on which patients (n=224) or parents (n=102) rated their experience with CGM over the prior 6 months. GMS is a 22-item scale on which patients (n=447) or parents (n=221) rated the blood glucose monitoring system they were using (home glucose meter with or without CGM) at baseline and 6 months.

RESULTS: The alpha coefficient for the CGM-SAT was > or = 0.94 for all respondents and for the GMS was > or = 0.84 for all respondents at baseline and 6 months. Parent-youth agreement was 0.52 for the CGM-SAT at 6 months and 0.24 and 0.20 for the GMS at baseline and 6 months for the Standard Care Group, respectively. Test-retest reliability of the GMS at 6 months for controls was r=0.76 for adult patients, 0.63 for pediatric patients, and 0.43 for parents. Factor analysis isolated measurement factors for the CGM-SAT labeled Benefits of CGM and Hassles of CGM, accounting for 33% and 9% of score variance, respectively. For the GMS, two factors emerged: Glucose Control and Social Complications, accounting for 28% and 9% of variance, respectively. Significant correlations of CGM-SAT with frequency of CGM use between 6 months and baseline and GMS with frequency of conventional daily self-monitoring of blood glucose at baseline support their convergent validity.

CONCLUSIONS: The CGM-SAT and GMS are reliable and valid measures of patient-reported CGM outcomes.

Author List

Juvenile Diabetes Research Foundation Continuous Glucose Monitoring Study Group


Rosanna V. Fiallo-Scharer MD Professor in the Pediatrics department at Medical College of Wisconsin

MESH terms used to index this publication - Major topics in bold

Blood Glucose
Blood Glucose Self-Monitoring
Diabetes Mellitus, Type 1
Hypoglycemic Agents
Longitudinal Studies
Patient Satisfaction
Principal Component Analysis
Reproducibility of Results
Surveys and Questionnaires
Young Adult