Sleep Disorders, Chronotype, and Functional Impairment in the Restrictive ADHD Phenotype

Dr. Behcet Uz Children's Hospital104 enrolled

Overview

This study aims to explore chronotype and sleep disturbances in ADHD subtypes and their relation to functional impairment.

The goal of this observational study is to compare morningness-eveningness and sleep disturbances between children diagnosed with Restrictive ADHD (ADHD-R) and those with Predominantly Inattentive ADHD (ADHD-PI), and to examine how these sleep-related features impact functional impairment.The main question it aims to answer is:Are chronotype differences and sleep disturbances associated with greater functional impairment in children with ADHD-R compared to ADHD-PI and typically developing peers?

Study Type

OBSERVATIONAL

Enrollment

104

Conditions

Attention Deficit Disorder With Hyperactivity Sleep Disorders, Circadian Rhythm Quality of Life Morningness Eveningness Preference

Eligibility

Sex: ALLMin age: 7 YearsMax age: 12 YearsHealthy volunteers:

Medical Language ↔ Plain English

Inclusion Criteria: * Age between 7 and 12 years * Willingness to participate in the study with provided consent * Diagnosis of ADHD according to the Schedule for Affective Disorders and Schizophrenia for School-Age Children - Present and Lifetime Version - Turkish adaptation (K-SADS); no comorbid psychiatric diagnosis (except Oppositional Defiant Disorder) * Presence of 6 or more inattention symptoms accompanied by 5 or fewer hyperactivity/impulsivity symptoms on the Disruptive Behavior Disorders Rating Scale based on Diagnostic and Statistical Manual of Mental Disorders-IV * No psychotropic medication use in the past 3 months Exclusion Criteria: * Families who do not consent to participate in the study * Children and adolescents with chronic medical conditions and/or currently taking any medications * Children and adolescents with intellectual disability (mental retardation) * Children and adolescents with comorbid psychiatric diagnoses * Presence of a neurological disorder * History of head trauma

Locations (1)

Dr. Behcet Uz Children's Hospital

Izmir, Konak, Turkey (Türkiye)

Outcomes

Primary Outcomes

Sleep Disturbance Scores

Total Score on the Children's Sleep Habits Questionnaire (CSHQ) - Short Form Sleep habits and sleep-related problems will be assessed using the Children's Sleep Habits Questionnaire (CSHQ) - Short Form, a 33-item parent-report measure. Items are rated based on the child's behavior over the past week. Each item is scored from 1 to 3, with higher scores indicating more frequent sleep problems. Items 32 and 33 are scored on a 0-2 scale, and items 1, 2, 3, 10, 11, and 26 are reverse-coded. The total score ranges from 33 to 97. A score of 41 or higher is considered clinically significant, indicating problematic sleep. Time Frame: At baseline (upon enrollment) Units of Measure: Total score (range: 33-97) Interpretation: Higher scores indicate more severe sleep problems.

Time frame: At baseline (upon enrollment)

Secondary Outcomes

Chronotype classification and total score on the Children's Chronotype Questionnaire (CCQ)

Chronotype preference will be assessed using the Children's Chronotype Questionnaire (CCQ), a parent-report tool adapted from the Munich Chronotype Questionnaire and the Children's Morningness-Eveningness Scale. Items 17-26 determine the chronotype score; items 17, 18, 24, and 25 are reverse-coded. Total scores classify children as morning-type (≤23), intermediate-type (24-32), or evening-type (≥33). Units of Measure: Chronotype type; total score (range: 10-40); average sleep duration (hours). Higher scores reflect stronger eveningness preference.

Time frame: At baseline (upon enrollment)

Data from ClinicalTrials.gov

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