Related Experiment Video
Updated: May 21, 2026

Glycemic Impact on Knee Osteoarthritis Symptoms on Physical, Radiographic, and Inflammatory Markers among Individuals Aged 50 and Over with Diabetes
Published on: March 7, 2025
[Causes and consequences of glycated hemoglobin variability on pediatric population]
Maria Inês Santos1, Catarina Resende, Frederico Rosário
1Consulta de Diabetologia Infantil, Serviço de Pediatria, Hospital de São Teotónio, Viseu, Portugal.
Insights
Adolescents and children with longer duration of type one diabetes mellitus show higher hemoglobin A1c (HbA1c) levels. Poor metabolic control in pediatric diabetes can lead to microalbuminuria and lipid disorders.
Area of Science:
- Pediatrics
- Endocrinology
- Metabolic Disorders
Background:
- Type one diabetes mellitus is a prevalent childhood disease with severe complications if poorly managed.
- Hemoglobin A1c (HbA1c) is the key indicator for metabolic control, and understanding its variability is crucial.
Purpose of the Study:
- To assess the impact of age and disease duration on HbA1c levels in pediatric patients.
- To investigate the correlation between HbA1c, serum lipid profiles, and microalbuminuria.
Main Methods:
- An observational, cross-sectional, and analytical study was conducted.
- Data from pediatric diabetic consultations were analyzed, including patient demographics, disease duration, metabolic control, and complications.
- Statistical analysis was performed using Excel 2003 and SPSS 15.0 with a 5% significance level.
Main Results:
- Adolescents exhibited significantly higher HbA1c (8.4%) compared to younger children (7.8%).
- Patients with diabetes exceeding five years had elevated HbA1c (9%) versus those with shorter duration (7.8%).
- Microalbuminuria (9%) and dyslipidemia (10%) were observed, with significantly higher HbA1c in affected patients (9.7% and 10% respectively).
Conclusions:
- Increased HbA1c levels are associated with adolescence and longer disease duration in pediatric type one diabetes.
- Complications like microalbuminuria and dyslipidemia are evident even in pediatric patients with suboptimal metabolic control.
Background:
Type one diabetes mellitus is the second most frequent disease in childhood, presenting with serious complications when inadequately controlled. The most useful measure of metabolic control is hemoglobin A1c (HbA1c), being essential the awareness of the causes of its variability.
Aim:
to evaluate the effect of age and time of disease on HbA1c; to evaluate the relationship between HbA1c and serum lipid and microalbuminuria values.
Methods:
Observational, transversal and analytic study, based on data obtained in the files of all patients that attain the Pediatric Diabetic Consult. The studied variables were: sex, actual age, diagnostic age, metabolic control and chronic complications. Statistical analysis was made with Excel2003® and SPSS 15.0®. A significance level of 5% was adopted.
Results:
a 96 diabetic population was obtained. Last year HbA1c average was 8,3% and was less than 7,5% in one third of the cases. Adolescent's HbA1c (8,4%) was significantly higher than in children (7,8%) (p=0,03). Diabetics with a disease longer than five years presented higher HbA1c values (9% vs. 7,8%; p<0,01). Microalbuminuria was present in 9% and lipid abnormalities in 10%. The ones with dyslipidemia had a significantly higher HbA1c (9,7% vs. 8%; p=0,001) as well as the ones with microalbuminuria (10% vs. 8%; p<0,001).
Conclusions:
In this study it was verified that adolescents and diabetics with a longer time of disease have higher HbA1c. It was also verified that the consequences of a poor metabolic control, such as microalbuminuria and lipid disorder, can be observed even at pediatric age.
Related Concept Videos
Hyperglycemia
Diabetes Mellitus: Type 2 and Gestational
Diabetes: Symptoms, Diagnosis, and Complications
Complications of Diabetes Mellitus
Pathophysiology of Diabetes
Type 1 diabetes is characterized by autoimmune-mediated destruction of pancreatic β cells, with environmental factors potentially triggering this process in genetically susceptible individuals. Despite many not having a family history, certain genes increase susceptibility, suggesting a...
Type II Diabetes II: Pathophysiology
