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Johnson, Susan L., L. McEwen, C. Newton, C. Martin, P. Raskin, Jeffrey Halter, and W. Herman. 2011. "The impact of continuous subcutaneous insulin infusion and multiple daily injections of insulin on glucose variability in older adults with type 2 diabetes." Journal of Diabetes and Its Complications, 25(4): 211-215.
Aims: To determine whether continuous subcutaneous insulin infusion (CSII) or multiple daily injections of insulin (MDI) are associated with improved glycemic variability. Methods: Type 2 diabetic patients >= 60 years of age were randomized to 12 months of CSII (n=53) or MDI (n=54) therapy. Patients were asked to complete monthly eight-point self-monitored glucose profiles (n=78) and continuous glucose monitoring systems (CGMS) for up to 72 h at Months 0, 6, and 12 (n=77). Within-day mean glucose, standard deviation (SD), range, pre- and post-prandial glucose, M value, and mean amplitude of glycemic excursions (MACE) were calculated from eight-point profiles. Mean glucose, SD, range, area under the curve (AUC) high (>180 mg/dl) and AUC-low (<70 mg/dl) were calculated from CGMS. Mixed model analyses of variance were used to examine the associations between treatment, time, and the study outcomes, adjusting for any effects of sex. Results: With the use of the eight-point profiles, CSII and MDI groups did not differ with respect to mean glucose, mean pre-prandial and post-prandial glucose, SD, range, M value, or MACE. With the CGMS data, there were no significant between-group differences in measures of mean glucose, range, SD, AUC-high, or AUC-low. In both treatment groups, all measures improved over time (P<.0001) except for AUC-low (P=.68) which did not change. There were treatment-by-time interactions when considering the CGMS range (P=.04) and AUC-high (P=.001), but no significant differences were found at individual time points. Conclusions: Glucose variability improved equally with CSII and MDI treatment in older patients with type 2 diabetes. (C) 2011 Elsevier Inc. All rights reserved.