A meta-analysis of 17 studies found that approximately 23% of children and adolescents with type 2 diabetes mellitus experience comorbid depression, with prevalence varying by glycemic control and assessment method.
- Nearly 1 in 4 youth with type 2 diabetes experience depression
- Depression rates were higher in those with better blood sugar control (HbA1c < 7%)
- Self-report screening tools detected more cases than clinical diagnostic interviews
How this compares to prior research
Previous research has established that depression is common among adults with type 2 diabetes, but prevalence estimates in pediatric populations have varied widely across individual studies. The relationship between glycemic control and mental health outcomes in youth has remained unclear, with some studies suggesting better diabetes management correlates with improved psychological wellbeing while others found no such association.
Depression prevalence trends in pediatric populations, global data, 1990–1999
Key findings
- The pooled prevalence of depression among 5,215 youth with type 2 diabetes was 23.1% across 17 studies
- Youth with HbA1c below 7% showed 52% depression prevalence compared to 24% in those with HbA1c at or above 7%
- Self-report scales identified depression in 25.2% of participants versus 12.2% using clinical diagnostic criteria
What this means in practice
- Ask your child\’s diabetes care team about routine mental health screening during clinic visits
- Consider that better blood sugar control does not protect against depression in youth with diabetes
- If your child completes a depression questionnaire, request follow-up clinical evaluation for accurate diagnosis
Frequently asked questions
How common is depression in children with type 2 diabetes?
Approximately 1 in 4 children and adolescents with type 2 diabetes experience depression, based on analysis of 17 studies involving over 5,000 participants.
Does blood sugar control affect depression rates in diabetic youth?
Yes. Youth with better glycemic control (HbA1c below 7%) showed higher depression prevalence at 52% compared to 24% in those with poorer control.
Why do depression rates vary so much across studies?
The assessment method matters significantly. Self-report questionnaires detect depression in 25% of youth while clinical diagnostic interviews identify it in only 12%.
Key terms explained
HbA1c
Hemoglobin A1c, a blood test measuring average blood sugar levels over the past 2-3 months
Comorbidity
The presence of two or more medical conditions occurring together in the same person
Meta-analysis
A statistical method that combines results from multiple studies to identify overall patterns and trends
Source: Depression comorbidity in children and adolescents with type 2 diabetes mellitus: a systematic review and meta-analysis. · DOI: doi: 10.3389/fendo.2026.1782080