Type 1 Diabetes and Long-Term Continuous Subcutaneous Insulin Infusion Therapy: A 10-Year Experience from Macedonia

Continuous Subcutaneous Insulin Infusion in Type 1 Diabetes Mellitus Patients: Results from the Spanish National Registry

Aim: To analyze the clinical effect of continuous subcutaneous insulin infusion (CSII) in type 1 diabetes mellitus (T1D) patients in the Spanish real-world scenario. Methods: All T1D patients on CSII registered in the SPAnish Insulin Pump (SPAIP) registry were included. The primary efficacy outcome was change in HbA1c during follow-up. Secondary efficacy outcomes included: insulin pump indications, diabetes complication rates, insulin and pump use, and continuous glucose monitoring (CGM) glycometrics. Patient data were typed through the web-based SPAIP registry. Results: Data from 2979 T1D patients treated with CSII were analyzed. The median age was 44 years (interquartile range [IQR] 34-52 years), and T1D duration was 27 years (IQR 18-35 years). The median duration of CSII therapy was 6 years (IQR 3-10 years). The main indications for treatment were suboptimal glycemic control (33.8%), hypoglycemia (22.1%), and increased glycemic variability (18.8%). Glycated hemoglobin decreased by 6 mmol/mol (95% CI, -5 to -6 mmol/mol, P < 0.001) [-0.5%, 95% CI, -0.4 to -0.5, P < 0.001] during the follow-up. The percentage of patients with severe hypoglycemia decreased from 14.9% to 0.9% (P < 0.001). We observed an inverse correlation between final HbA1c levels and CGM adherence (R = -0.24, P < 0.001) or percentage of time with active hybrid closed-loop functions (R = -0.25, P < 0.001). Conclusions: CSII treatment was associated with a sustained improvement in glycemic control in the Spanish population. This benefit was greater among patients with higher CGM or active hybrid closed-loop functions adherence. The protocol was publicly registered at ClinicalTrials.gov (NCT04761094).

10-Day structured initiation protocol from multiple daily injection to hybrid closed-loop system in children and adolescents with type 1 diabetes

AIM

The aim of this study was to evaluate the 10-day initiation protocol for MiniMed 670G hybrid closed-loop (HCL) system in individuals with type 1 diabetes on multiple daily injection (MDI) in achieving desirable glycemic control.

METHODS

An open-label single-arm, single-center, clinical investigation in children aged 7-18 years on MDI following a structured protocol: 2 days, HCL system assessment; 5 days, HCL system training (2-h sessions on 5 consecutive days with groups of 3-5 participants and families); 3 days, Manual Mode use of HCL system; 84 days, Auto Mode use of the HCL system, cumulating in 10 days from MDI to Auto Mode activation.

RESULTS

A total of 30 children (age 10.24 ± 2.6 years) were enrolled in the study, and all completed the planned 84 days on Auto Mode. The participants used the sensor for a median of 92% of the time and spent a median of 89% in Auto Mode. The mean HbA1c decreased from 8.2 ± 1.4% (66 ± 15.3 mmol/mol) at baseline to 6.7 ± 0.5% (50 ± 5.5 mmol/mol) at the end of the study (p = 0.017). Time in range (70-180 mg/dL) increased from 46.9 ± 18.5% at baseline to 75.6 ± 6.9% in Auto Mode (p < 0.001). This was achieved while spending 2.8% of the time below 70 mg/dL and without any severe hypoglycemia or DKA.

CONCLUSION

Children and adolescents with type 1 diabetes on MDI therapy can successfully initiate the HCL system, using a concise structured 10-day protocol.

Long-term effects of continuous subcutaneous insulin infusion in adults with type 1 diabetes mellitus patients: Results of a public healthcare system

AIM

To evaluate the long-term clinical effect of continuous subcutaneous insulin infusion (CSII) in adult type 1 diabetes mellitus (T1DM) patients in a regional public healthcare system real-world scenario.

METHODS

All adult T1DM patients on CSII for ≥10 years subjected to follow-up in the regional Castilla-La Mancha Public Health Service were included. The primary efficacy outcome was the variation in HbA_1c during follow-up. Direct patient data were compiled through the web-based Spanish national registry on CSII therapy.

RESULTS

A total of 69 T1DM adult patients were treated with insulin pumps for ≥10 years in our region. The mean age was 45.0±10.5 years, with a T1DM duration of 13.9±8.5 years. The mean duration of CSII therapy was 11.4±2.1 years. The main indications for treatment were high glucose variability (39%), problematic hypoglycemia (26%), and HbA_1c >53mmol/mol (7%) on multiple daily injections (20%). Sensor-augmented pump therapy was used by 31% of the patients. Glycosylated hemoglobin did not change during follow-up (58±11mmol/mol vs. 58±11mmol/mol; 7.5±1.0 vs. 7.5±1.0; p=0.66). However, the percentage of patients with at least one episode of severe hypoglycemia during the last year and unnoticed hypoglycemia decreased from 36% to 7% (p=0.006) and from 38% to 32% (p<0.001), respectively. The proportion of subjects with ≥1 episode of diabetic ketoacidosis in the last year decreased from 30% to 6% (p=0.045).

CONCLUSIONS

The reduction of severe hypoglycemia without deterioration of glycemic control can be sustained over long-term CSII therapy.

Continuous Subcutaneous Insulin Infusion in Adult Type 1 Diabetes Mellitus Patients: Results from a Public Health System

Aims: To analyze prevalence and clinical effect of continuous subcutaneous insulin infusion (CSII) in adult type 1 diabetes mellitus (T1DM) patients in a public health system real-world scenario. Materials and Methods: All adult T1DM patients on CSII being followed at Castilla-La Mancha Health Public Service were included. Primary efficacy outcome was the change in HbA_1c during the follow-up. Secondary efficacy outcomes included evaluation of the following variables: insulin pump indications, diabetes complication rates, insulin and pump use, continuous glucose monitoring use, patients achieving an HbA_1c decrease ≥6 mmol/mol (0.5%) with or without severe hypoglycemia, and discontinuations. Direct patient data were typed through the web-based Spanish national registry on CSII therapy by nine diabetologists from eight different health care areas. Results: A total of 7% of T1DM adult patients were treated with insulin pumps in our region, with a regional prevalence of 18.7 CSII patients/100,000 inhabitants. Three hundred thirteen patients were analyzed with a mean age of 34.1 ± 11.0 years and T1DM duration of 16.6 ± 9.7 years. Mean duration of CSII therapy was 6.2 ± 4.0 years. Data completion was 91.2%. Main indications for treatment were high glucose variability (36%) and suboptimal glycemic control (32%). Mean duration of CSII therapy was 6.2 ± 4.0 years. Sensor-augment pump therapy was used by 26% of the patients. Glycated hemoglobin decreased to -5 mmol/mol (95% CI -6 to -3 mmol/mol; P < 0.001) during the follow-up (Mean difference in change -0.4%, 95% CI -0.5 to -0.2; P < 0.001). Percentage of patients with severe hypoglycemia decreased from 32% to 13% (P < 0.001). Frequent nonsevere hypoglycemia, severe hypoglycemia, and diabetic ketoacidosis were less frequent among patients using higher number of daily basal rates at the study end. The rate of CSII interruption was 3.8%. Conclusions: Prevalence of CSII therapy in our region remains under 10% of adult T1DM patients, although CSII treatment was associated with a sustained improvement in glycemic control.

A national survey on the efficacy and safety of continuous subcutaneous insulin infusion in patients with type 1 diabetes in Spain

AIMS

To assess safety and benefits of continuous subcutaneous insulin infusion (CSII) therapy in a cohort of type 1 diabetes patients in Spain.

METHODS

A web-based national registry was created by the Working Group of the Spanish Diabetes Association. All patients on CSII being followed at selected referral centers were included. A cross-sectional analysis was performed.

RESULTS

A total of 1275 patients were included. Data completion for patients on CSII was 67 ± 32%. Indications for treatment were suboptimal glycemic control (32%), high glucose variability (24%), preconception care (14%) and hypoglycemia (11%). In the patients on CSII for ≥1 year (n = 843, mean CSII duration of 5 years), HbA_1c decreased by 5 mmol/mol (0.5%) in the whole population and by 8 mmol/mol (0.7%) in subjects with suboptimal glycemic control as CSII indication. Percentage of patients achieving HbA_1c ≤ 53 mmol/mol (7%) increased from 20% before CSII to 34% at the end of follow-up. Severe hypoglycemia decreased from 29% to 5%. The rate of discontinuation was 9.5%. HbA_1c was lower in patients using bolus advisor and temporary basal rates.

CONCLUSIONS

CSII was associated with a sustained improvement in glycemic control and a reduction in severe hypoglycemia. The use of advanced CSII settings was related to better glycemic control.