Diabetes Mellitus, Type 2 Clinical Trial
Official title:
GLucose Monitoring Programme SingaporE, Phase 2(GLiMPSE2)
Many with type 2 diabetes (T2D) remain sub-optimally controlled. Structured programmes requiring dietary and lifestyle intervention have been shown to improve control but are time-and labour-intensive. The role for self-monitoring of blood glucose with capillary blood glucose (CBG) readings is uncertain. The use of flash glucose monitoring (FGM) with education may effect improvements in awareness and self-management behaviour and hence glycaemic control. The investigators aim to compare the effects of FGM versus CBG fingersticks in the context of a structured education programme over a 6-month period in adults with type 2 diabetes. 200 adults (>21y) with sub-optimally controlled T2D (7.5-10%) on either diet-controlled, oral glucose lowering drugs or background insulin will be enrolled and randomised into the intervention arm (FGM and education) or control arm (capillary glucose fingersticks and education). The intervention arm will monitor glucose using FGM continuously for 6 weeks and intermittently thereafter up to 24 weeks. The control group will monitor glucose using CBG fingersticks up to 24 weeks. During the intervention period(0-24w), both arms will undergo the same schedule of visits (-2w, 0w, 8w, 16w, 24w) and 6 education sessions. Both groups will be followed up at weeks 38 and 52. Primary outcome is HbA1c change from baseline at 24 weeks. This study will provide novel data on the use of FGM versus CBG in Type 2 diabetes and its impact on glycaemic control.
Up to 200 adults will be recruited from 5 different sites in Singapore. Following screening, consent and enrolment, all participants wear a blinded flash glucose monitoring system that is masked to the user and asked to continue testing capillary glucose readings at least once daily for 2 weeks (week -2 to week -1).Participants who are able to wear the sensor for the 2 weeks, and are monitoring capillary glucose levels at least 70% of the time for the 2 weeks (≥10 readings/2weeks), will carry on to be randomised to intervention or control group (week 0). Upon fulfilling the criteria of blinded sensor wear of 2 weeks and 70% capillary glucose monitoring over 2 weeks, participants will be randomised into the control or the intervention arm, using web- based retrieval of randomisation allocation. At baseline (week 0), all participants in both groups will receive baseline education on diabetes self-management, including blood glucose targets, role and timing of diabetes medications, and individualised education on macronutrient composition of meals and the goals of nutritional therapy in type 2 diabetes. Both groups will use the blinded FGM data at baseline for education. In total, both groups will receive 6 education sessions over the 24 week period, delivered by diabetes nurse educators or nurses and dietitians. The diabetes educators and physicians will be aligned towards a standardised curriculum for consistency of education through a train-the-trainer workshop. Participants randomised to the control arm will receive an education package and be given education on how to self-manage glucose levels using a standard capillary blood glucose device. They will be encouraged to test blood glucose readings at least twice a day but preferably 4 times daily. Participants randomised to the intervention arm will wear the flash glucose monitoring system, and will be given education on how to use sensor glucose data for self-management. Flash glucose monitoring will be used continuously for 6 weeks. From week 6 to week 24, the frequency of use of flash glucose monitoring will be reduced to one sensor every 4 weeks. The intervention period is for 24 weeks, followed by an observation period up to 52 weeks. After the 24-week intervention period, participants from both arms will wear a blinded sensor for the last 2 weeks of the intervention period (week 25 to week 26). During the observation period (weeks 24 to 52), participants in both arms will be encouraged to continue monitoring glucose levels. Medication titrations will be left to the discretion of the primary physician. Physician consults will be at weeks 0, 8, 24, 38, 52. There will be no medication up-titration at week 0 although the physician may choose to optimize medications if needed: e.g. moving basal from bedtime to the morning to reduce the risk of nocturnal hypoglycemia or switching from a sulphonylurea agent to an alternative oral medication to reduce the risk of hypoglycaemia. If down-titration of medications is required, the reduction/cessation of sulphonylurea agents or insulin therapy will be encouraged to alleviate the risk of hypoglycaemia and promote weight loss. If there is no improvement in glycemic control or deterioration of glycaemic control at weeks 8 and 16 (laboratory HbA1c more than of equal to 8.5% for consecutive readings, one laboratory HbA1c more than or equal to 10% or a 2% point HbA1c increase from previous visit), medications may be up-titrated. The use of agents which do not increase the risk of hypoglycaemia and promote weight loss will be encouraged. If prandial insulin or premixed insulin is added to the treatment regimen from week 8 onwards, subjects will still remain within the study and be included in the analysis. ;
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