Homeostasis Model Assessment of ß-Cell Function for Diagnosis of Insulinoma.

CONTEXT: Diagnosis of insulinoma is based on different criteria from the 72-hour fasting test according to current guidelines (Endocrine Society [ES], European [ENETS], and North American [NANETS] Neuroendocrine Tumor Societies), including assessment of ß-cell function by glucagon stimulation test. OBJECTIVE: This study tested whether the homeostasis model assessment of insulin secretion, including assessment of ß-cell function, (HOMA-B) at the end of the fasting test provides comparable efficacy for insulinoma diagnosis. METHODS: In 104 patients with suspected insulinoma, 72-hour fasting tests were performed with frequent assessment of glucose, insulin, and C-peptide in venous blood. HOMA-B values using insulin and C-peptide were calculated at the end of the fasting test, as defined by the lowest glucose concentration from each participant. RESULTS: HOMA-B was more than 6.5-fold higher in patients with (n = 23) than in those without (n = 81) insulinoma (insulin and C-peptide; both P < .001). HOMA-B (cutoff using insulin >253 a.u. and C-peptide >270 a.u.) had a sensitivity of 0.96, 0.78 to 1.00, and a specificity of 0.96 or greater (≥0.89-0.99) for insulinoma diagnosis. ES and ENETS/NANETS criteria reached a diagnostic sensitivity of less than or equal to 0.96 (≤0.78-1.00) and ≤0.83 (≤0.61-0.95) as well as specificity of ≤0.85 (≤0.76-0.92) and less than or equal to 1.00 (≤0.96-1.00) for insulin, and C-peptide, respectively. Using insulin for HOMA-B, sensitivity tended to be higher compared to ENETS/NANETS criteria (P = .063) and specificity was higher compared to ES criteria using insulin and C-peptide (both P < .005). CONCLUSION: HOMA-B, as calculated at the end of the fasting test employing defined cutoffs for insulin and C-peptide, provides excellent diagnostic efficacy, suggesting that it might represent an alternative and precise tool to diagnose insulinoma.

A novel smartphone app to change risk behaviors of women after gestational diabetes: A randomized controlled trial.

AIMS: Women after gestational diabetes mellitus (GDM) are a risk group for cardiometabolic diseases but are hard to reach by conventional lifestyle programs. Therefore, we tested whether a novel, smartphone-delivered intervention, TRIANGLE, is accepted by women after GDM and alters cardiometabolic risk behaviors and outcomes. TRIANGLE targets gradual habit change of mind and emotion, physical activity, nutrition, and sleep. METHODS: We conducted a 6-month multicenter, randomized-controlled trial of TRIANGLE versus standard care with 66 women 3-18 months after GDM in Germany. The primary outcome was the proportion of women achieving ≥3 out of 5 Diabetes Prevention Program goals, i.e. physical activity ≥150 min/week (moderate to high intensity), fiber intake ≥15 g/1,000 kcal, fat intake <30% of total energy intake, saturated fat intake <10% of total energy intake, and weight reduction ≥5% if BMI ≥23 kg/m2 or weight maintenance if BMI <23 kg/m2. Intervention participants also rated the TRIANGLE app in the Mobile Application Rating Scale (uMARS). RESULTS: In the predefined, modified intention-to-treat analysis including 64 women, 6 out of 27 women in the intervention group [22%(10-40)] and 3 out of 27 women in the control group [11%(3-27)] reached the primary outcome (p = 0.47). In the predefined per-protocol intervention subgroup, the proportion was 4 out of 14 women [29%(11-55); p = 0.20 vs. control]. TRIANGLE app users were active on 42% of days and rated the app's quality and perceived impact with 4.3±0.8 out of 5 uMARS points. CONCLUSIONS: This first trial did not show the efficacy of the TRIANGLE intervention. However, the app was well accepted and considered helpful by most users. Therefore, this trial supports further development and testing of TRIANGLE and other app interventions for women after GDM. Additionally, it identifies necessary adaptations in trial design to better accommodate non-intensive lifestyle interventions for this target group. TRIAL REGISTRATION: Trial registration at drks.de (DRKS00012996).

[Acute metabolic complications in diabetes]. / Akute diabetische Stoffwechselentgleisungen.

Over time, diabetes patients are at increased risk for microvascular and macrovascular complications leading to increased morbidity and mortality compared to metabolically healthy people. In addition, acute life-threatening metabolic derangements at first manifestation as well as during the course of the disease may occur, comprising diabetic ketoacidosis, hyperosmolar hyperglycaemic state and hypoglycaemia. Diabetes-related emergencies require fast diagnosis and early treatment initiation as well as close monitoring of vital signs and laboratory parameters. The present article gives an overview on the acute metabolic complications in diabetes, focussing on diagnostic work-up and treatment goals.

Associations Between Migration Background and Media and Information Behavior in Primary School Children.

BACKGROUND: Children with migration background and from low socio-economic status are at higher risk for overweight. To determine appropriate media channels to possibly reach children with targeted health information, it has to be considered that the media and information behavior of children has changed during the last decades. OBJECTIVE: We examined the media and information behavior of children in low socio-economic districts, focusing on those with migration background. METHODS: Fourteen 3rd grade classes (n=250 children, 68.0% with migration background) completed a questionnaire regarding their media consumption, which was based on existing validated surveys. RESULTS: ≥ 50% of the children watched TV and around 40% used both mobile phones and computers/tablets/internet for ≥1 h/day. Books were the most popular analogue media (61.6% of children), whereas magazines/newspapers and radio (18.4 and 16.0% of children, respectively) were used less frequently. Furthermore, they regularly used internet, TV and their teachers (63.0, 48.8 and 44.8% of children, respectively) as information source. Especially children with compared to those without migration background less likely used the radio (P=0.0002) and their family as information source (P=0.0017). CONCLUSIONS: Children attending 3rd grade class, especially with migration background, can be addressed through digital media rather than the radio. This may help to sustainably support children outside school with targeted health information.

Positive Effects of Practical Nutrition Lessons in a Primary School Setting with a High Proportion of Migrant School Children.

BACKGROUND: Children with migration background are at increased risk for overweight, partly due to less favorable dietary habits compared to their German counterparts. We examined the effects of practical nutrition lessons among children with a high proportion of migration background in a primary school setting. METHODS: Ten 3rd and 4th grade classes (n=166 children, 73% with migration background) received the intervention and nine school classes (n=139 children, 76% with migration background) served as control. Before, shortly after (only among the intervention group) and three months after the three-day practical nutrition lessons, the nutrition-related skills, behavior, attitudes, and knowledge of the children were assessed using a questionnaire. Changes between baseline and 1st follow-up among children of the intervention group were calculated using linear mixed models. Differences between the two groups for changes between baseline and 2nd follow-up were tested using linear regression analyses. Models were adjusted for potential confounders. RESULTS: Shortly after the practical nutrition lessons, the children of the intervention group had improved their knowledge (ß=1.7; 95% CI: 1.0; 2.4, P<0.001) and skills (ß=1.8; 95% CI: 1.4; 2.2, P<0.001). These changes were sustainable and larger in the intervention compared to the control group (knowledge: ß=1.6; 95% CI: 0.7; 2.5, P<0.001; skills: ß=1.3; 95% CI: 0.7; 1.9, P<0.001). Changes in nutrition-related behavior and attitudes did not differ between the groups. CONCLUSIONS: Providing practical nutrition lessons in a primary school setting with a high proportion of children with immigrational background improved the children's nutrition-related knowledge and skills.

Comparison of the diagnostic accuracy of the current guidelines for detecting insulinoma.

Objective Insulinomas are rare pancreatic endocrine tumors characterized by hypoglycemia. Guidelines by the Endocrine Society (ES), the European (ENETS) and the North American (NANETS) Neuroendocrine Tumor Societies provide divergent diagnostic criteria. This study compared the diagnostic accuracy of these different criteria during the 72-h fasting test. Design Retrospective cohort study. Methods From 2000 to 2014, 64 patients with a suspected insulinoma underwent a 72-h fasting test and were included in the analysis. This study assessed the diagnostic sensitivity, specificity and accuracy based on venous blood glucose and corresponding insulin levels measured by electrochemiluminescence immunoassay (ECLIA). Results Based on 64 individuals (18 with, 46 without insulinoma), the ES criteria provided a diagnostic sensitivity of 0.94 (0.73-1.00), specificity of 0.89 (0.76-0.96) and accuracy of 0.91 (0.81-0.96). ENETS/NANETS criteria reached a diagnostic sensitivity of 0.78 (0.52-0.94), specificity of 1.00 (0.92-1.00) and accuracy of 0.94 (0.85-0.98). Conclusions These results point to a higher diagnostic sensitivity with less specificity for diagnosing insulinoma using ES criteria and a higher specificity at lower sensitivity by using ENETS/NANETS criteria. Before considering these results when applying the different criteria in clinical practice, the results should be confirmed in further studies comprising larger cohorts.