Continuous subcutaneous glucose monitoring in children with type 1 diabetes mellitus: a single-blind, randomized, controlled trial

BACKGROUND: Tight glycemic control delays the long-term complications of type 1 diabetes mellitus (T1DM) but increases the risk for hypoglycemia. The continuous glucose-monitoring system (CGMS) provides blood glucose (BG) readings every 5 min, and its accuracy and reliability has been established in adults. However, there are limited data on its efficacy and safety in children. The purpose of this study was to determine if CGMS use improves metabolic control in children with T1DM. METHODS: Twenty-seven children (12 male) with T1DM participated in this single-blind, randomized, controlled trial. Participants (age: 11.4 +/- 3.7 (mean +/- SD) yr, range: 7-17 yr) were randomized to an intervention group (n = 18) or a control group (n = 9). Both groups wore the CGMS for 72-h periods at 0, 2, and 4 months. Adjustments in therapy for the intervention group were based on both CGMS and self-monitoring of BG (SMBG) data, while only SMBG data were used for the control group. Hemoglobin A1c (HbA1c) was determined at 0, 2, 4, and 6 months. The change in HbA1c from 0 to 6 months (HbA1c(Delta1-4)) and mean daily area under the CGMS curve for glucose <70 mg/dL area under the curve (AUC(<70)) were compared between groups. RESULTS: At study entry, HbA1c levels were similar in the intervention and control groups (8.4 +/- 0.98 and 8.8 +/- 0.86%, respectively; p = 0.12) but were significantly lower in the intervention group compared with the control group at study completion (7.8 +/- 0.88 and 8.6 +/- 0.95%, respectively; p = 0.02). The decrease in HbA1c of 0.61 +/- 0.68% in the intervention group was statistically significant (p = 0.03), whereas the decrease in HbA1c of 0.28 +/- 0.78% in the control group was not. Nonetheless, the differences in HbA1c(Delta1-4) between groups did not reach statistical significance (p = 0.13). There was no statistically significant difference in AUC(<70) between study groups (p = 0.18). CONCLUSION: CGMS use may improve metabolic control in children with T1DM without increasing the risk for hypoglycemia.     

Electrogastrography in children and adolescents with type 1 diabetes: weak correlation with metabolic control parameters

AIM: To evaluate gastric myoelectrical activity with respect to duration and metabolic control of type 1 diabetes mellitus (T1DM). METHODS: 172 children and adolescents with T1DM (mean 14.4+/-3.7 y), divided into subgroups depending on diabetes duration (< 5 and > 5 y), and 35 healthy controls (mean 13.93+/-3.59 y) were examined. All subjects underwent electrogastrography (EGG) performed after overnight fasting. In subjects with T1DM, haemoglobin A1c (HbA1c) and blood glucose levels during EGG records were measured. RESULTS: 15.69% of T1DM patients and 91.42% of the controls fulfilled normal EGG criteria (p < 0.001). T1DM subjects had a lower percentage of fasting normogastria (34.56+/-27.35% vs 69.84+/-18.16%, p = 0.0001) and higher bradygastria (51.97+/-30.24% vs 19.11+/-15.01%, p = 0.0001) compared to controls. In diabetic patients, an increase in postprandial normogastria (60.37+/-23.96% vs 76.68+/-12.38, p < 0.05) and a decrease in bradygastria percentage (25.67+/-21.01% vs 9.58+/-7.13%, p < 0.05) was observed. In children with disease < 5 y, diabetes duration correlated with power ratio (r = - 0.27, p = 0.01), postprandial normogastria (r = - 0.24, p = 0.03) and tachygastria (r = 0.25, p = 0.02). Weak correlations between EGG parameters and glucose (preprandial dominant frequency r = - 0.19, p < 0.05; postprandial normogastria r = 0.23, p < 0.01) and HbA1c levels (preprandial bradygastria r = 0.19, postprandial dominant power r = 0.23; p < 0.05) were observed. CONCLUSION: Gastric myoelectrical rhythm derangement is present in a large proportion of young diabetic patients. Bradygastria is the most prominent EGG abnormality. Weak correlation was found between EGG parameters and diabetes metabolic control.     

The effectiveness of Internet-based blood glucose monitoring system on improving diabetes control in adolescents with type 1 diabetes

Landau Z, Mazor‐Aronovitch K, Boaz M, Blaychfeld‐Magnazi M, Graph‐Barel C, Levek‐Motola N, Pinhas‐Hamiel O. The effectiveness of Internet‐based blood glucose monitoring system on improving diabetes control in adolescents with type 1 diabetes. Objective: To determine whether the use of an Internet‐based blood glucose monitoring system could improve glycemic control in adolescents with type 1 diabetes mellitus (T1DM). Methods: In a randomized, controlled clinical trial, a total of 70 adolescent subjects with T1DM were recruited. Subjects randomized to the intervention group (n = 36) were instructed to submit their blood glucose levels weekly by Internet to the Diabetes Care Team during a period of 6 months. Subjects randomized to the control group (n = 34) did not submit results but were under routine follow‐up. Results: At baseline, patients were 15.1 ± 2.6 years of age with mean HbA1c of 8.3 ± 1.3%. At the 6‐month follow‐up period, no by‐group differences in change from baseline to end of treatment HbA1c levels were detected. In the intervention group, 12/36 did not submit blood glucose levels and were classified as non‐compliant. In a secondary exploratory analysis in which non‐compliant patients were omitted, HbA1c values in the compliant intervention group declined from 8.5 ± 1.7% at baseline to 8.2 ± 1.2% at 6 months, while in the control group HbA1c values increased from 8.2 ± 1.1 to 8.4 ± 1.1%, this difference did not reach statistical significance. Conclusions: An Internet‐based blood glucose monitoring system was not associated with improved glycemic control in adolescents with T1DM. Identification of a sub‐group of compliant subjects who may improve metabolic control by using this tool is needed.     

Optimal control of type 1 diabetes mellitus in youth receiving intensive treatment

OBJECTIVE: To investigate the impact of factors that might interfere with optimal glycemic control in youth with type 1 diabetes mellitus (T1DM) in the current era of intensive management, including the interplay of race/ethnicity and socioeconomic status (SES) on HbA1c levels. STUDY DESIGN: This study comprised a database review of all patients under age 18 years with T1DM for at least 6 months duration. Sex, age, race/ethnicity, duration of diabetes, mode of insulin administration (pump vs injection), body mass index, SES, and HbA1c level were recorded at each patient's most recent visit between January and September 2003. RESULTS: Mean HbA1c level for the 455 patients was 7.6% +/- 1.4%; only 31% of patients failed to meet the therapeutic goal of < 8.0%. Multiple linear regression analysis identified female sex (P = .02), older age (P = .001), longer duration of diabetes (P < .001), injection therapy (P < .001), and lower SES (P = .001) as significantly associated with higher HbA1c level. After adjustment for SES, race/ethnicity was not a determinant of HbA1c level. CONCLUSIONS: Low SES had a greater association with poor metabolic control than did race/ethnicity, which was not associated with differences in HbA1c level after controlling for SES. Most children were able to attain glycemic targets at least as good as the Diabetes Control and Complications Trial recommendations in a large clinical practice.     

Low risk of overt nephropathy after 24 yr of childhood-onset type 1 diabetes mellitus (T1DM) in Norway

AIM: To estimate the risk of diabetic nephropathy and associated risk factors in a nationwide cohort of childhood-onset type 1 diabetes mellitus (T1DM) and 19-30 yr of diabetes duration. METHODS: Patients diagnosed with childhood-onset T1DM (<15 yr) from 1973 through 1982, who previously (1989-1990) participated in a clinical examination to assess diabetic complications, were invited for a new examination in 2002-2003. Of 355 eligible patients, 299 participated (84.2%), and complete urine samples for evaluation of albuminuria were obtained from 295 patients, with a mean age of 33 yr (range 20.9-44.0) and mean diabetes duration of 24 yr (range 19.3-29.9). Persistent microalbuminuria and overt nephropathy [albumin excretion rate (AER) 15-200 microg/min and AER > 200 microg/min, respectively] in at least two out of three consecutive overnight urine samples were defined as diabetic nephropathy. RESULTS: Overt nephropathy was found in 7.8% [95% confidence interval (CI) 4.7-10.9] and persistent microalbuminuria in 14.9% (95% CI 10.8-19.0) of the subjects. Hemoglobin A1c (HbA1c) (p = 0.001), systolic blood pressure (BP) (p = 0.002), total cholesterol (p = 0.019), and C-reactive protein (CRP) (p = 0.019) were associated with diabetic nephropathy. Significant predictors in 1989-1990 for the development of diabetic nephropathy in 2002-2003 were HbA1c (p < 0.001), AER (p = 0.007), and cholesterol (p = 0.022). CONCLUSIONS: In a subgroup of patients diagnosed with childhood-onset T1DM in 1973-1982, 7.8% had overt nephropathy after 19-30 yr of diabetes duration, which is low compared with studies from other countries. HbA1c, systolic BP, total cholesterol, and CRP were each independently associated with diabetic nephropathy.     

Telecare for teenagers with type 1 diabetes: a trial

AIM: The aim of this paper was to test in teenagers with type 1 diabetes mellitus (T1DM) the Glucobeeb (Gb), a web based tool to support the diabetes care. METHODS: Gb transfers glucometer's data by phone and Internet to the PC of practitioner in files dedicated to each patient; the response returns to patient as 1-min vocal message. From outpatients paediatric clinic 28 teenagers (mean 14.8 years, range 10-20, male 14) with T1DM on multiple daily injections insulin therapy, with glicated haemoglobin (HbA1c) over 7% and >2 years' duration of the disease (9.1 years, range 2-15), were consequently randomized to telecare (glucometer transmission with feedback, group A) or control (standard communication by phone and face-to-face visits, group B). Glycaemia was tested four times per day and data transmitted every 2 weeks; clinician feedback returned within the following week. Two controls were excluded after randomization. Outcomes of 14 patients of A were compared with 12 of B. RESULTS: In intervention group average HbA1c% decreased from baseline at 3 and 6 months in comparison with controls (9.5, 9.0, 9.1, vs 9.1, 9.4, 9.4 respectively). Controls after 6 months were introduced to Gb, and similar trend of HbA1c was observed in the following examinations at 3 and 6 month (9.4, 8.9, 8.7). Then, in both groups HbA1c after 12 months of Gb increased, and after 18 reduced (A: 9.2, and 8.8, B 9.1 and 8.5 respectively). The enhancement of HbA1c from baseline to end was significant (P=0.01). CONCLUSION: The tool improves metabolic control in teenagers with T1DM.     

Prevalence of EGG derangement in newly diagnosed type 1 diabetes in childhood

OBJECTIVE: To evaluate gastric myoelectrical activity in children with newly diagnosed type 1 diabetes melliltus (T1DM) in relation to blood glucose control and visceral neuropathy. METHODS: Percutaneous electrogastrograpy (EGG) was performed on 42 children (20 F; mean age 12.9 +/- 3.1 years) with T1DM of <1 year's duration and on 35 healthy controls (18 F; mean age 13.4 +/- 3.6 years). After overnight fasting, a 30-minute EGG recording was followed by test meal consumption and then a 60-minute postprandial EGG aquisition. Fasting and postprandial periods were analyzed for gastric dysrhythmias, dominant frequency (DF) and additional parameters. In T1DM patients, HbA1c and blood glucose levels were measured and tests for visceral neuropathy were performed. RESULTS: In 41 T1DM patients (98%), cardiovascular neuropathy tests were negative. In 12 of those patients (29%) and in 32 healthy controls (91%), electrogastrograms were normal. The percentages of fasting and postprandial gastric dysrhythmias were significantly higher in T1DM patients compared to controls (P < 0,05). In T1DM children after feeding, some normalization of gastric myoelectrical rhythm was observed: normogastria increased nearly 2-fold to 72.6 +/- 22.9% and bradygastria decreased to 20.8 +/- 20.4% from 52.3 +/- 32.4% (P < 0.05). The percentages of fasting bradygastria and normogastria were correlated with glycemia level (r = -0.55 and r = 0.51, respectively; P < 0.05), as was postprandial DF (r = 0.41; P < 0.05). There was no correlation between HbA1c levels and EGG parameters. CONCLUSIONS: Derangement of the gastric myoelectrical activity is present in 71% of children with early stage T1DM. Glucose levels influence gastric myoelectrical activity, whereas long-term glucose control (HbA1c level) does not correlate with EGG parameters.     

Onset of type 1 diabetes mellitus in two patients with maturity onset diabetes of the young

The association between maturity onset diabetes of the young (MODY) and type 1 diabetes mellitus (T1DM) has been rarely described. We report two patients affected by MODY who developed T1DM. Case 1: a 4-yr-old girl referred for glycosuria presented hemoglobin A1c (HbA1c) of 6.6%. Islet cell antibodies (ICA) and anti-glutamic acid decarboxylase (GADA) were initially negative. As her father, uncle and grandmother showed mild hyperglycemia, they were screened for MODY 2. A novel mutation in glucokinase gene was found in the family. Few months later, her glycemic control worsened consistently and she required insulin treatment. A high titer of GADA and ICA was then detected. Six years afterwards insulin requirement is 0.8 U/kg and HbA1c 6.7%. Case 2: a 15-yr-old boy treated for growth hormone deficiency was found with a blood glucose level of 106 mg/dL. HbA1c was 7.2%, ICA and GADA were negative. Family history was positive for autoimmune diseases and type 2 diabetes mellitus. The patient was investigated for MODY 2 and MODY 3, and a mutation of hepatocyte nuclear factor-1 alpha gene was found. The same mutation was found in the mother who had never been referred for hyperglycemia. After 1 yr, due to an unjustified worsening of the metabolic control, autoimmunity was again investigated and a mild positivity was found. He then required insulin therapy and after 5 yr current HbA1c was 8.2%. The diagnosis of MODY does not exclude the risk of developing T1DM. Therefore autoimmunity should be investigated when ordinary treatments fail and metabolic control unexpectedly worsens.     

初发1型糖尿病患儿外周血单个核细胞FOXP3和CTLA-4表达的研究

目的：研究初发1型糖尿病患儿外周血叉状头转录因子( FOXP3)和细胞毒性T细胞相关抗原-4(CTLA-4)表达水平,探讨它们在1型糖尿病发病中的作用。方法选取50例初发1型糖尿病患儿和30例健康儿童,采用real-time PCR法研究FOXP3和CTLA-4 mRNA表达;ELISA方法检测血清中可溶性FOXP3( sFOXP3)和CTLA-4( sCTLA-4)蛋白水平;分别应用免疫印记法、高效液相离子层析法和电化学发光法测量糖尿病抗体、HbA1C及C肽。结果1型糖尿病患儿FOXP3 mRNA及蛋白表达低于对照组[0.95±0.48 vs.2.11±0.79,(6.27±1.49) ng/ml vs.(9.02±2.37) ng/ml,均P<0.01],而CTLA-4 mRNA及蛋白表达高于对照组[2.43±0.83 vs.1.94±0.84,(77.88±22.34) ng/ml vs.(65.97±12.11) ng/ml,P<0.01];1型糖尿病患儿FOXP3和CTLA-4基因与蛋白表达均呈正相关(r＝0.758、0.396,均P<0.05);FOXP3与CTLA-4蛋白表达具有相关性(r＝－0.624,P<0.05)。结论初发1型糖尿病患儿外周血FOXP3和CTLA-4的基因及蛋白表达异常,FOXP3调控CTLA-4在调节性T 细胞的表达,提示免疫机制参与1型糖尿病的发生。     

Predictors of metabolic control at one year in a population of pediatric patients with type 2 diabetes mellitus: a retrospective study

BACKGROUND/OBJECTIVES: The rising prevalence of pediatric type 2 diabetes mellitus (DM2) and non-adherence to diabetes regimens pose challenges to obtaining optimal control. This study evaluated factors that may impact glycemic control (HbA1c): age, Tanner stage, body mass index (BMI), total daily insulin (TDD), metformin dose (MET), activity level, frequency of clinic visits and adherence. METHODS: One-year data from 72 patients (ages 8.6-17.8 years) were collected retrospectively. From that sample, 57 patients who continued to attend clinic for the entire year were assessed and divided into optimal and suboptimal HbA1c control groups. RESULTS: All factors measured were similar in the two groups, except for lower initial and 1.0-year HbA1c, TDD, and rates of missing MET and insulin in the optimal HbA1c control group. CONCLUSIONS: Initial glycemic status and adherence rate predicted metabolic control at one year. Early identification of DM2 may improve metabolic outcome, which may improve medical regimen adherence.     

Prevalence of microalbuminuria in young patients with type 1 and type 2 diabetes mellitus

This study was designed to determine the prevalence of microalbuminuria and the associated risk factors in patients with childhood-onset diabetes mellitus (DM). One hundred and sixty-three patients (141 with type 1 DM [DM1] and 22 with type 2 DM [DM21), aged 8 to 28 years, were evaluated for albumin excretion rate and HbA(1c). The mean duration of DM was 8.1 +/- 3.4 and 5.5 +/- 3.9 years in DM1 and DM2, respectively. Persistent microalbuminuria and macroalbuminuria were observed in 11.3% and 2.8% of patients with DM1, and 18.2% and 4.5% in patients with DM2, respectively. In DM1, the duration of DM, age of onset, and HbA(1c) levels were significant predictors of microalbuminuria. Our observations suggest that screening for microalbuminuria should be started from early adolescence in patients with DM1 and DM2.     

青少年1型糖尿病伴阳性抑郁症状患者血清皮质醇变化特点

目的了解青少年1型糖尿病(T1DM)伴阳性抑郁症状患者的血清皮质醇变化特点。方法对28例青少年T1DM患者和31例健康同龄人采用流调中心用抑郁自评量表筛查阳性抑郁症状者,分为T1DM伴阳性抑郁症状组(15例)、单纯T1DM组(13例)、单纯阳性抑郁症状组(15例)和正常对照组(16例)。比较各组清晨空腹血清皮质醇水平,并运用Pearson相关分析法分析T1DM患者血清皮质醇和糖化血红蛋白(Hb A1c)与抑郁症状得分的相关性。结果与31例健康同龄人相比,28例T1DM患者平均清晨空腹血清皮质醇水平明显升高(P0.01)。与单纯阳性抑郁症状组和正常对照组比较,T1DM伴阳性抑郁症状组患者清晨空腹血清皮质醇水平均明显升高(P0.01)。T1DM患者血清Hb A1c值与其抑郁症状得分呈正相关(r=0.481,P=0.010)。结论青少年T1DM伴阳性抑郁症状患者清晨空腹血清皮质醇水平明显升高,提示两者共病患者的肾上腺皮质激素释放激素-促肾上腺皮质激素-皮质醇轴功能受损。青少年T1DM患者阳性抑郁症状的发生与糖代谢控制不良有关。     

Profound changes in the GH–IGF‐I system in adolescent girls with IDDM: can IGFBP1 be used to reflect overall glucose regulation?

Disturbances in the relations between insulin, growth hormone (GH) and insulin-like growth factor I (IGF-I) may be a major cause behind deteriorated metabolic control in adolescent girls with type I diabetes. These patients have increased GH secretion and low IGF-I concentrations. The aim of this study was to identify possible endocrine mechanisms behind good and poor glycaemic control in such girls, focusing on the insulin-GH-IGF-I axis. Ten girls with well-controlled insulin-dependent diabetes mellitus (IDDM), hemoglobin A1c (HbA1c) 6.5+/-0.4% (normal range 3.9-5.2%) and nine healthy controls were investigated and compared with 11 girls with poor glucose regulation, HbA1c 10.9+/-0.4%, and their corresponding controls. Serum profiles of glucose, insulin, GH and IGF-binding protein 1 (IGFBP1) were analysed in addition to IGF-I and HbA1c. Two interesting observations were made. GH concentrations were equally elevated in the two diabetic groups regardless of metabolic control (mean 24 h GH - girls with poorly controlled diabetes 10.0+/-1.0 mU/L vs 9.8+/-1.7 - girls with well-controlled diabetes; p=ns). Likewise, the IGF-I concentrations were reduced to the same extent (233+/-19 vs 242+/-23 microg/L; p=0.75). Secondly, despite similar insulin concentrations (mean 24 h insulin - girls with poorly controlled diabetes 22.9+/-2.6 and girls with well-controlled diabetes 27.3+/-2.9 mU/L, respectively; p=0.26), there was a marked difference in IGFBP1 concentrations between the two groups with IDDM (mean IGFBP1 - girls with poorly controlled diabetes 70.5+/-9.1 microg/L vs girls with well-controlled diabetes 28.6+/-3.3; p<0.001). Despite equally elevated GH concentrations that may induce insulin resistance, the markedly lower concentrations of IGFBP1 in the well-controlled group indicate a higher hepatic insulin sensitivity in these girls compared with those with a poor control. Furthermore, in spite of similar total IGF-I concentrations, the lower IGFBP1 concentrations may result in higher IGF-I bioactivity in the well-controlled group. This may be reflected in better growth of the well-controlled group whose height of 168.7+/-0.9 vs 163.6+/-1.2 cm was significantly different (p<0.004). IGFBP1 may be a marker of overall insulinization in adolescents with type 1 diabetes, independent of the absolute insulin dose used for therapy.     

Glycemic control in adolescents with type 1 diabetes mellitus improves lipid serum levels and oxidative stress

Introduction:  Atherosclerosis begins in childhood, and diabetes is a risk factor for coronary heart disease. Dyslipidemia is prevalent in children with type 1 diabetes mellitus (T1DM), with an association between elevated hemoglobin A1c (HbA1c), serum lipid levels, and oxidative stress. Our aim was to examine the effect of metabolic control on serum lipid levels and oxidative stress in adolescents with T1DM.
Methods:  Twenty-six adolescents (13 boys and 13 girls), aged 15.65 ± 1.5 yr, with disease duration of 5.9 ± 2.8 yr and average HbA1c 10.8 ± 1.9% were assigned to intensive insulin therapy for 3 months. Comparisons for HbA1c, low-density lipoprotein (LDL) cholesterol, high-density lipoprotein cholesterol, total triglycerides (TG), total cholesterol (TC), apolipoprotein AI, apolipoprotein AII, apolipoprotein B (ApoB), and thiobarbituric acid reactive substances (TBARS) were done between patients whose HbA1c improved by 0.5% or more (GR1) and the rest of the cohort (patients whose HbA1c improved by <0.5%, did not change, or increased) (GR2).
Results:  ApoB (p = 0.047) and TBARS (p = 0.01) were significantly lower at the end of the study in GR1. In GR2, TC (p = 0.01) and LDL (p = 0.03) were significantly higher at study end. Overall, significant beneficial changes in TC (p = 0.006), TG (p = 0.04), LDL (p = 0.02), ApoB (p = 0.015), and oxidative stress (p = 0.001) were found in GR1 compared with GR2.
Conclusions:  We provide direct evidence for the beneficial effect of tight metabolic control on serum lipids and oxidative stress in adolescents with T1DM, indicating that tight metabolic control may reduce cardiovascular risk in these patients.     

The effects of weight status on treatment outcomes in a randomized clinical trial of multisystemic therapy for adolescents with type 1 diabetes and chronically poor metabolic control

OBJECTIVE: The purpose of the study was to determine if being overweight attenuated the effect of multisystemic therapy (MST), an intensive, home-based psychotherapy, on metabolic outcomes among adolescents with type 1 diabetes and chronically poor metabolic control. As overweight is a marker of insulin resistance, it was hypothesized that weight status would limit the impact of behavioral changes in traditional aspects of adherence to the type 1 diabetes regimen on metabolic control. METHODS: A randomized controlled trial was conducted with 127 adolescents with type 1 diabetes and hemoglobin A1c (HbA1c) > or = 8% for the past year. Participants were randomly assigned to MST plus standard care (SC) or SC alone. Data were collected at baseline and 7 months post-test (i.e., treatment termination). Overweight was defined as body mass index > 85%. RESULTS: Forty-one percent of the sample was overweight. Intent-to-treat analysis showed that adolescents in the MST group had a significant increase in frequency of blood glucose testing (BGT) [F(1,113) = 15.43, p = 0.0001] and a trend to significant improvement in HbA1c [F(1,123) = 2.99, p = 0.086] irrespective of weight. However, HbA1c decreased 0.91% (p = 0.002) for normal weight adolescents in the MST group compared with 0.20% (p = 0.570) for overweight adolescents in the MST group. DISCUSSION: Despite improvements in adherence to BGT, overweight adolescents receiving an intensive behavioral intervention did not have a significant improvement in metabolic control compared with their normal weight peers. Overweight, an accepted marker of insulin resistance and a major public health issue, warrants increased consideration in intervention trials to improve the metabolic control of adolescents with type 1 diabetes.     

Intensive diabetes management in adolescents with type 1 diabetes: the importance of intensive follow-up

Minimal information exists on the education and follow-up required to successfully initiate intensive diabetes management (IDM) in adolescents with type 1 diabetes. We performed a retrospective analysis of HbA1c 3 and 15 months after initiation of IDM in two cohorts: (1) 17 patients who received individualised education in IDM and intensive early follow-up, and (2) 11 patients who participated in group education for initiation of IDM with standard follow-up. Entry HbA1c was higher in the individualised education patients (9.5 +/- 0.3% [mean +/- SE] versus 8.2 +/- 0.4%, p = 0.02). After 3 months of IDM, HbA1c improved in both cohorts reaching similar levels (individualised: 7.0 +/- 0.1%, p < 0.0001 vs entry; group: 7.3 +/- 0.2%, p = 0.05). During the following year, with routine follow-up for both cohorts, HbA1c levels rose approximately 1% as patients reverted to a multiple daily injection regimen. Irrespective of the educational approach, we believe maintenance of IDM and optimal HbA1c requires long-term intensive follow-up.     

Prevalence and risk factors for microalbuminuria in a population-based sample of children and adolescents with T1DM in Western Australia

OBJECTIVE: To define the prevalence and describe the natural history of microalbuminuria (MA) in a population-based sample of children with type 1 diabetes mellitus (T1DM). METHODS: Children with T1DM diagnosed or=20 and <200 microg/min, developed in 128 subjects (13.4%) at mean diabetes duration of 7.6 yrs. Cumulative probability for MA was 16% after 10 yrs. Determinants for MA were HbA1c [hazard ratio (HR) 1.21; 95% confidence interval (CI) 1.05-1.38; p = 0.007], onset of puberty (HR 8.01; 95% CI 3.18-20.16; p < 0.001) and age at diagnosis (HR 1.25; 95% CI 1.18-1.33; p < 0.001). Females had a higher probability for MA during puberty than males (p = 0.03). The total incidence of MA (subjects with MA/100 person-years) was 1.26, 1.85 and 2.44 for those who developed diabetes at ages <5 yrs, 5-11 yrs and >11 yrs, respectively. CONCLUSIONS: Onset of puberty, diabetes duration and metabolic control are major factors predisposing the development of MA. Children diagnosed with T1DM at younger ages have a prolonged time for developing MA.     

Euthyroid sick syndrome in type I diabetes mellitus in children and adolescents

We studied concentrations of thyroid hormones (T3, T4, FT4, rT3, TBG and TSH) in 62 type I diabetic children and adolescents. The patients were classified into group A (n = 27, good control, HbA1c less than 10%), group B (n = 19, poor control, HbA1c greater than 10%) and group C (n = 16, diabetic ketoacidosis, pH less than 7.1 and HCO3 less than 15 mmol/L. All patients were treated with two daily injections of purified monocomponent insulins. Thirty healthy subjects of the same age served as control group. Patients in group B and C had significantly lower T3 and higher rT3 levels (p less than 0.001) compared to the matched controls (1.5 vs 2.2; 0.9 vs 2.2; 0.58 vs 0.3 and 0.6 vs 0.3 nmol/L). Serum TBG levels were significantly lower (p less than 0.01) in the group A (19.5 +/- 4.3 mg/L), group B (20.3 +/- 3.3) and group C (18.0 +/- 3.4) compared with control group (24.2 +/- 3.1). There was significantly negative correlation between T3 and HbA1c in group B (r = 0.546; p less than 0.02). The results of this study confirm that euthyroid sick syndrome does exist in type I diabetic children and adolescents with poor metabolic control and ketoacidosis. The inverse relationship between T3 and HbA1c percentage (low T3 and high HbA1c) points to the poor diabetic control.     

Evaluation of 1,5-anhydroglucitol, hemoglobin A1c, and glucose levels in youth and young adults with type 1 diabetes and healthy controls

Mehta SN, Schwartz N, Wood JR, Svoren BM, Laffel LMB. Evaluation of 1,5‐anhydroglucitol, hemoglobin A1c, and glucose levels in youth and young adults with type 1 diabetes and healthy controls. Background and objective: Serum 1,5‐anhydroglucitol (1,5‐AG) is a marker of hyperglycemic excursions in adults with diabetes and hemoglobin A1c (HbA1c) < 8%. We compared 1,5‐AG levels among youth and young adults with and without type 1 diabetes (T1D) and investigated the utility of 1,5‐AG in the assessment of glycemic status in pediatric T1D. Methods: We compared 1,5‐AG, HbA1c, and plasma glucose levels in 138 patients with T1D (duration ≥1 yr) and 136 healthy controls, aged 10–30 yr. Within each group, we investigated associations between 1,5‐AG and clinical characteristics, HbA1c and random plasma glucose. For patients with T1D, 1,5‐AG was further analyzed according to HbA1c strata: <8, 8–9, and >9%. Results: Compared to controls, patients with T1D had higher HbA1c (8.5 ± 1.6 vs. 5.1 ± 0.4%, p < 0.0001), lower 1,5‐AG (4.0 ± 2.0 vs. 24.7 ± 6.4 µg/mL, p < 0.0001), and higher glucose (11.1 ± 5.2 vs. 5.1 ± 0.9 mmol/L, p < 0.0001). Males had higher 1,5‐AG than females within patients (4.5 ± 2.3 vs. 3.4 ± 1.6 µg/mL, p = 0.003) and controls (26.0 ± 6.6 vs. 23.5 ± 6.0 µg/mL, p = 0.02). 1,5‐AG was not correlated with glucose in either group. 1,5‐AG was significantly correlated to HbA1c in patients, but not controls. For patients with HbA1c < 8%, 1,5‐AG demonstrated the widest range and was not predicted by HbA1c; 1,5‐AG levels were narrowly distributed among patients with HbA1c ≥ 8%. Conclusions: Youth and young adults with T1D demonstrate similar 1,5‐AG levels which are distinct from controls. 1,5‐AG assessment may provide unique information beyond that provided by HbA1c in the mid‐term assessment of glycemic control in young patients with T1D and HbA1c < 8%.     

The influence of physical activity on ghrelin and IGF‐1/IGFBP‐3 levels in children and adolescents with type 1 diabetes mellitus

Huber J, Fröhlich‐Reiterer EE, Sudi K, Suppan E, Weinhandl G, Jasser‐Nitsche H, Aigner R, Borkenstein MH. The influence of physical activity on ghrelin and IGF‐1/IGFBP‐3 levels in children and adolescents with type 1 diabetes mellitus. Objectives: The aim of the study was to determine the influence of regular physical activity on ghrelin and IGF‐1/IGFBP‐3 levels during a diabetes camp. Methods: Twenty‐eight children and adolescents (14 boys; mean age 12.1 yr) with type 1 diabetes mellitus (T1DM, mean duration of diabetes 4.8 yr) attending a 2‐wk diabetes camp that features increased regular physical activities have been studied. Serum levels of ghrelin (total and acylated), growth hormone (GH), insulin‐like growth factor‐1 (IGF‐1), insulin‐like growth factor‐bindng protein‐3 (IGFBP‐3) and insulin were measured in fasting state on day 1 and day 14. Improvement of metabolic control was documented by haemoglobin A1c (HbA1c). Glucose levels and insulin doses were determined daily. Results: Mean insulin dosage decreased from 0.87 to 0.78 U/kg/d, mean HbA1c levels decreased from 8.6 to 8.3%, but the changes were not statistical. There was a significant decline in total ghrelin. IGFBP‐3 and IGF‐1 decreased also significantly. Total basal ghrelin was inversely related to the change in IGFBP‐3. Conclusions: We hypothesize an association between ghrelin and metabolic control in T1DM. Higher ghrelin levels might be associated with poor metabolic control. The dynamic of IGFBP‐3 levels appears to be under the influence of basal ghrelin concentrations in T1DM.