Sleep is an important health behavior for children and adolescents due to the impact it has on both mental and physical development. Although sleep is considered a resting period, it is also a period when the brain work to encode and consolidate memories into more stable representations for long term recall . Unfortunately, pediatric sleep disorders affect 25 - 40% of youth and several studies showed that children with chronic illness experience more problems with initiating and maintaining sleep than their non- chronically ill children .

Type 1 diabetes mellitus (T1DM) affects the quality of sleep in children and adolescents as well as their caregivers. Sleep disturbances in patients with T1DM may negatively impact their ability to manage their diabetes .

Inclusion Criteria:

• Children and adolescents aged 6 to 15 years .
• diagnosed with T1DM for at least 6 months
• attending the pediatric diabetes outpatient clinic at Sohag University Hospital.
• Age and sex matched control group for acute non-serious illnesses

Exclusion Criteria:

• Children and adolescents with associated neurological or psychiatric disorders .

Children and adolescents aged 6 to 15 years diagnosed with T1DM for at least 6 months and attending the pediatric diabetes outpatient clinic at Sohag University Hospital will be included in the study.

Age and sex matched control group will be included from children and adolescents attending the general pediatric outpatient clinic at Sohag University hospital for acute non-serious illnesses.