Publications by authors named "Dick Mul"

Background: Complexity of glucose regulation in persons with type 1 diabetes (PWDs) necessitates increased automation of insulin delivery (AID). This study aimed to analyze real-world data over 12 months from PWDs who started using the MiniMed 780G (MM780G) advanced hybrid closed-loop (aHCL) AID system at the Diabeter clinic, focusing on glucometrics and clinical outcomes.

Methods: Persons with type 1 diabetes switching to the MM780G system were included.

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Aim: Diabetes mellitus is a major cause of death. Outpatients with diabetes have more complications than patients in general practice; mortality patterns have only been studied in the total diabetes population. This study aims to assess mortality, causes, and predictors in outpatients with diabetes.

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Article Synopsis
  • * The study involved a prospective cohort of 611 participants aged 16 and older with at least 5 years of T1D, plus a second group of 160 participants with a minimum of 35 years of T1D, gathering a range of health data, physical assessments, and biological samples.
  • * Preliminary findings indicate that additional C-peptide secretion was noted in 10% of individuals, linking fasting C-peptide levels with reduced hypoglycemia awareness
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Aim: Socio-economic status (SES) influences diabetes onset, progression and treatment. In this study, the associations between SES and use of hospital care were assessed, focusing on hospitalizations, technology and cardiovascular complications.

Materials And Methods: This was an observational cohort study comprising 196 695 patients with diabetes (all types and ages) treated in 65 hospitals across the Netherlands from 2019 to 2020 using reimbursement data.

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Background: Diabetes mellitus forms a slow pandemic. Cardiovascular risk and quality of diabetes care are strongly associated. Quality indicators improve diabetes management and reduce mortality and costs.

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Aims: Paediatric diabetes care has become increasingly specialised due to the multidisciplinary approach and technological developments. Guidelines recommend sufficient experience of treatment teams. This study evaluates associations between hospital volume and resource use and hospital expenditure in Dutch children with diabetes.

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Objectives: Cardiovascular disease (CVD) is a precarious complication of type 1 diabetes (T1D). Alongside glycaemic control, lipid and blood pressure (BP) management are essential for the prevention of CVD. However, age-specific differences in lipid and BP between individuals with T1D and the general population are relatively unknown.

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Aims: This study aimed to provide a global insight into initiatives in type 1 diabetes care driven by the COVID-19 pandemic and associations with glycemic outcomes.

Methods: An online questionnaire regarding diabetes care before and during the pandemic was sent to all centers (n = 97, 66,985 youth with type 1 diabetes) active in the SWEET registry. Eighty-two responded, and 70 (42,798 youth with type 1 diabetes) had available data (from individuals with type 1 diabetes duration >3 months, aged ≤21 years) for all 4 years from 2018 to 2021.

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Article Synopsis
  • The introduction of insulin pumps has improved glycemic control and quality of life for many type 1 diabetes patients, but some still switch back to multiple daily injections (MDI).
  • A systematic review analyzed 826 studies, ultimately including 67, revealing discontinuation rates of insulin pumps ranging from 0% to 30%, with a median of 7%.
  • Key reasons for discontinuation included device discomfort, impact on daily activities, and personal factors such as HbA1c levels, treatment adherence issues, and demographic variables like age and gender.
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Background: Diabetes mellitus is one of the most common chronic diseases in childhood. With more advanced care options including ever-evolving technology, allocation of resources becomes increasingly important to guarantee equal care for all. Therefore, we investigated healthcare resource utilization, hospital costs, and its determinants in Dutch children with diabetes.

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Article Synopsis
  • Optimal diabetes care is crucial for preventing complications in individuals with type 1 diabetes (T1D), which involves evaluating target achievement and understanding risk factors.
  • A study collected data from 1,737 adults with T1D in the Netherlands, comparing target achievement for glycemic, cholesterol, and blood pressure levels among those with and without cardiovascular disease (CVD).
  • Results showed lower target achievement rates for those with CVD, while factors like gender and insulin pump use positively influenced success in those without CVD, indicating a need for tailored management strategies.
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Aims/hypothesis: Sex differences are present in cardiovascular care and in outcomes among adults with type 1 diabetes mellitus, which typically commences in childhood. Whether sex influences care and outcomes in childhood is not known. This systematic review provides an overview of sex differences in children with type 1 diabetes, focusing on patient and disease characteristics, treatment, comorbidities and complications.

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Introduction: Restoration of immune tolerance may halt progression of autoimmune diseases. Tolerogenic dendritic cells (tolDC) inhibit antigen-specific proinflammatory T-cells, generate antigen-specific regulatory T-cells and promote IL-10 production , providing an appealing immunotherapy to intervene in autoimmune disease progression.

Methods: A placebo-controlled, dose escalation phase 1 clinical trial in nine adult patients with long-standing type 1 diabetes (T1D) demonstrated the safety and feasibility of two (prime-boost) vaccinations with tolDC pulsed with a proinsulin peptide.

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Article Synopsis
  • The study evaluated how stable C-peptide levels are over time in individuals with long-standing type 1 diabetes, focusing on both fasting C-peptide and responses after a mixed-meal tolerance test (MMTT).
  • Among 607 participants, only 25% showed detectable fasting C-peptide, with levels significantly decreasing over one year, and patients with higher levels were generally diagnosed at an older age and had shorter disease duration.
  • The findings indicated that stimulated C-peptide was found in 10% more participants during MMTT compared to fasting tests, and results from MMTT at 90 and 120 minutes closely matched overall C-peptide area under the curve measurements.
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Objective: To analyze whether the coronavirus disease 2019 (COVID-19) pandemic increased the number of cases or impacted seasonality of new-onset type 1 diabetes (T1D) in large pediatric diabetes centers globally.

Research Design And Methods: We analyzed data on 17,280 cases of T1D diagnosed during 2018-2021 from 92 worldwide centers participating in the SWEET registry using hierarchic linear regression models.

Results: The average number of new-onset T1D cases per center adjusted for the total number of patients treated at the center per year and stratified by age-groups increased from 11.

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Objective: To examine the prevalence, time trends, and risk factors of diabetic retinopathy (DR) among youth with type 1 diabetes (T1D) from 11 countries (Australia, Austria, Denmark, England, Germany, Italy, Luxemburg, Netherlands, Slovenia, United States, and Wales).

Subjects And Methods: Data on individuals aged 10-21 years with T1D for >1 year during the period 2000-2020 were analyzed. We used a cross-sectional design using the most recent year of visit to investigate the time trend.

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Article Synopsis
  • Cardiovascular disease is the main cause of death for individuals with type 1 diabetes, highlighting the importance of managing cardiovascular risks as part of their treatment.
  • The study assessed how well lipid and blood pressure management were implemented among individuals with type 1 diabetes, following guidelines from Dutch, ADA, and NICE over a one-year period.
  • Results showed low prescription rates for lipid-lowering and antihypertensive medications, especially in younger patients, with many failing to meet recommended treatment targets.
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  • C-peptide is a key marker for assessing insulin production in type 1 diabetes (T1D), and accurate assays are essential for detecting tiny changes over time.
  • A study compared two assays: the ultrasensitive Mercodia ELISA and Beckman IRMA, focusing on their performance in measuring low C-peptide levels.
  • The Beckman IRMA showed better quantification capability than the Mercodia ELISA, emphasizing the need for establishing limits of quantification in assays before their use in research and clinical settings.
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Aims: To update and extend a previous cross-sectional international comparison of glycaemic control in people with type 1 diabetes.

Methods: Data were obtained for 520,392 children and adults with type 1 diabetes from 17 population and five clinic-based data sources in countries or regions between 2016 and 2020. Median HbA (IQR) and proportions of individuals with HbA < 58 mmol/mol (<7.

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Background: Treatment of diabetes mellitus has majorly improved over the past century, however, the disease burden is high and its prevalence still expanding. Further insight in the diabetes population is imperative to improve the quality of diabetes care by enhancement of knowledge-based diabetes management strategies. To this end, in 2017 a Dutch nationwide consortium of diabetologists, paediatric endocrinologists, and diabetes patients has founded a national outpatient diabetes care registry named Dutch Pediatric and Adult Registry of Diabetes (DPARD).

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Chronic low-grade inflammation in type 1 diabetes (T1D) might increase hepcidin synthesis, possibly resulting in functional iron deficiency (FID). We hypothesized that in T1D children with FID, hepcidin concentrations are increased compared to those with normal iron status and those with absolute iron deficiency (AID). We evaluated hepcidin concentrations in T1D children in relation to iron status, and investigated whether hepcidin is useful in assessing FID.

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Objective: To study the optimal cut-off value for anti-tissue transglutaminase type 2 IgA antibodies (TG2A) in serum to select for diagnostic small bowel biopsies for celiac disease in children with type 1 diabetes mellitus.

Study Design: Children with type 1 diabetes mellitus with elevated TG2A titers and duodenal biopsies performed during the course of their diabetes treatment were included. Anti-endomysial antibodies were recorded if present.

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Aims/hypothesis: Heterogeneity in individuals with type 1 diabetes has become more generally appreciated, but has not yet been extensively and systematically characterised. Here, we aimed to characterise type 1 diabetes heterogeneity by creating immunological, genetic and clinical profiles for individuals with juvenile-onset type 1 diabetes in a cross-sectional study.

Methods: Participants were HLA-genotyped to determine HLA-DR-DQ risk, and SNP-genotyped to generate a non-HLA genetic risk score (GRS) based on 93 type 1 diabetes-associated SNP variants outside the MHC region.

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Aim: To assess 1) the prevalence of children and adolescents with type 1 diabetes (T1D) changing from low-risk into borderline-high-risk lipid levels or from borderline-high-risk into high-risk lipid levels ('lose track of lipids') and 2) the power of a risk score including the determinants HbA1c, body mass index (BMI), gender, age, diabetes duration and ethnicity in predicting which patients lose track of lipids.

Methods: 651 children and adolescents with T1D were included in this longitudinal retrospective cohort study. Lipid dynamics and the impact of the risk score on losing track of lipids were evaluated.

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