Endocrine Abstracts

A proportion of individuals with T1DM decline insulin pump use and instead use continuous glucose monitors (CGM) with insulin pens. We wished to describe glycaemic control and clinical characteristics of this specific cohort and look for any associations between the two. Interrogation of electronic databases Dexcom Clarity and Imeddoc was performed to identify individuals with T1DM over 18 years of age using Dexcom CGM and insulin pens. Glycaemic control was evaluated using the parameters of time in range (TIR), time below range (TBR) and time above range (TAR), referring to blood sugar ranges of 4-10 mmol/l/l, <4 mmol/l/l, and >10 mmol/l/lrespectively. Guidelines recommend target ranges for TIR, TBR and TAR of >70%, <4% and <25% respectively. Statistical analysis was performed using SPSS. The mean age of the 263 individuals was 49 and 53% were males. The mean body mass index was 28.8kg/m2 and mean duration of diagnosis was 20 years. Diabetic Retinopathy was present in 51%. Targets for TIR, TBR and TAR were reached in 17%, 92%, and 16% respectively. Average TIR was 51%. The only statistically significant associations identified found that age over 65, elevated BMI and presence of diabetic retinopathy were negative predictors of achieving TAR target. While only 16% achieved the TIR target of 70%, the average TIR was 51%, and 92% achieved the TBR target. The lower-than-expected mean age of 49 shows that this is not merely an older population. Correlation with HbA1c prior to CGM use may be an even more insightful comparator than TIR targets.